7O3C | pdb_00007o3c

Murine supercomplex CIII2CIV in the mature unlocked conformation

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
F	SCOP2 Family	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105496	4002070	SCOP2 (2022-06-29)
F	SCOP2 Superfamily	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105497	3000797	SCOP2 (2022-06-29)
Q [auth R]	SCOP2B Superfamily	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105495	3000770	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105495	3000770	SCOP2B (2022-06-29)
S [auth U]	SCOP2B Superfamily	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105489	3000779	SCOP2B (2022-06-29)
I [auth J]	SCOP2B Superfamily	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105489	3000779	SCOP2B (2022-06-29)
W [auth a]	SCOP2 Family	Cytochrome c oxidase subunit I-like	8105416	4001989	SCOP2 (2022-06-29)
W [auth a]	SCOP2 Superfamily	Cytochrome c oxidase subunit I-like	8105417	3000653	SCOP2 (2022-06-29)
Y [auth c]	SCOP2B Superfamily	Cytochrome c oxidase subunit III-like	8105419	3000671	SCOP2B (2022-06-29)
BA [auth f]	SCOP2B Superfamily	Rubredoxin-like	8105435	3001257	SCOP2B (2022-06-29)
DA [auth h]	SCOP2 Family	Cytochrome c oxidase subunit h	8105444	4000996	SCOP2 (2022-06-29)
DA [auth h]	SCOP2 Superfamily	Cytochrome c oxidase subunit h	8105445	3000395	SCOP2 (2022-06-29)
EA [auth i]	SCOP2B Superfamily	Mitochondrial cytochrome c oxidase subunit VIc	8105491	3000598	SCOP2B (2022-06-29)
FA [auth k]	SCOP2 Family	Mitochondrial cytochrome c oxidase subunit VIIb	8105446	4001959	SCOP2 (2022-06-29)
FA [auth k]	SCOP2 Superfamily	Mitochondrial cytochrome c oxidase subunit VIIb	8105447	3000613	SCOP2 (2022-06-29)
GA [auth l]	SCOP2 Family	Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa)	8105432	4001966	SCOP2 (2022-06-29)
GA [auth l]	SCOP2 Superfamily	Mitochondrial cytochrome c oxidase subunit VIIc (aka VIIIa)	8105433	3000624	SCOP2 (2022-06-29)
HA [auth m]	SCOP2 Family	Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX)	8105442	4001973	SCOP2 (2022-06-29)
HA [auth m]	SCOP2 Superfamily	Mitochondrial cytochrome c oxidase subunit VIIIb (aka IX)	8105443	3000633	SCOP2 (2022-06-29)
R [auth S]	SCOP2B Superfamily	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105459	3000806	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105459	3000806	SCOP2B (2022-06-29)
CA [auth g]	SCOP2B Superfamily	Mitochondrial cytochrome c oxidase subunit VIa	8105441	3000592	SCOP2B (2022-06-29)
AA [auth e]	SCOP2 Family	Cytochrome c oxidase subunit E	8105430	4001366	SCOP2 (2022-06-29)
AA [auth e]	SCOP2 Superfamily	Cytochrome c oxidase subunit E	8105431	3001402	SCOP2 (2022-06-29)
Z [auth d]	SCOP2 Family	Mitochondrial cytochrome c oxidase subunit IV	8105436	4001940	SCOP2 (2022-06-29)
Z [auth d]	SCOP2 Superfamily	Mitochondrial cytochrome c oxidase subunit IV	8105437	3000582	SCOP2 (2022-06-29)
T [auth V]	SCOP2 Family	Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105492	4002065	SCOP2 (2022-06-29)
T [auth V]	SCOP2 Superfamily	Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105493	3000787	SCOP2 (2022-06-29)
J [auth K]	SCOP2B Superfamily	Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8105493	3000787	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
K [auth L]	e7o3cL1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
A	e7o3cA1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
C	e7o3cC1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
M [auth N]	e7o3cN1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
N [auth O]	e7o3cO1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
D	e7o3cD1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
O [auth P]	e7o3cP1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
E	e7o3cE1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
F	e7o3cF1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
P [auth Q]	e7o3cQ1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
Q [auth R]	e7o3cR1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
G	e7o3cG1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
S [auth U]	e7o3cU1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
I [auth J]	e7o3cJ1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
W [auth a]	e7o3ca1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
X [auth b]	e7o3cb1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
Y [auth c]	e7o3cc1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
BA [auth f]	e7o3cf1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
DA [auth h]	e7o3ch1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
EA [auth i]	e7o3ci1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
FA [auth k]	e7o3ck1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
GA [auth l]	e7o3cl1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
HA [auth m]	e7o3cm1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
R [auth S]	e7o3cS1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
H	e7o3cH1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
L [auth M]	e7o3cM1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
B	e7o3cB1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
CA [auth g]	e7o3cg1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
AA [auth e]	e7o3ce1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
Z [auth d]	e7o3cd1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
U [auth T]	e7o3cT1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
T [auth V]	e7o3cV1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)
J [auth K]	e7o3cK1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Secretin_N	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
K [auth L]	3.30.830.10	Alpha Beta	2-Layer Sandwich	Cytochrome Bc1 Complex	Chain A, domain 1	CATH (utative)
A	3.30.830.10	Alpha Beta	2-Layer Sandwich	Cytochrome Bc1 Complex	Chain A, domain 1	CATH (utative)
O [auth P]	2.102.10.10	Mainly Beta	3-layer Sandwich	Rieske Iron-sulfur Protein	Rieske [2Fe-2S] iron-sulphur domain	CATH (utative)
E	2.102.10.10	Mainly Beta	3-layer Sandwich	Rieske Iron-sulfur Protein	Rieske [2Fe-2S] iron-sulphur domain	CATH (utative)
W [auth a]	1.20.210.10	Mainly Alpha	Up-down Bundle	Cytochrome C Oxidase	Chain A	CATH (utative)
X [auth b]	1.10.287.90	Mainly Alpha	Orthogonal Bundle	Helix Hairpins		CATH (utative)
X [auth b]	2.60.40.420	Mainly Beta	Sandwich	Immunoglobulin-like	Cupredoxins - blue copper proteins	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, K [auth L]	PF05193	Peptidase M16 inactive domain (Peptidase_M16_C)	Peptidase M16 inactive domain	Peptidase M16 consists of two structurally related domains. One is the active peptidase, whereas the other is inactive. The two domains hold the substrate like a clamp [1].	Domain
A, K [auth L]	PF00675	Insulinase (Peptidase family M16) (Peptidase_M16)	Insulinase (Peptidase family M16)	-	Family
A, K [auth L]	PF00115	Cytochrome C and Quinol oxidase polypeptide I (COX1)	Cytochrome C and Quinol oxidase polypeptide I	-	Family
C, M [auth N]	PF00032	Cytochrome b(C-terminal)/b6/petD (Cytochrom_B_C)	Cytochrome b(C-terminal)/b6/petD		Domain
C, M [auth N]	PF00033	Cytochrome b/b6/petB (Cytochrome_B)	Cytochrome b/b6/petB		Domain
C, M [auth N]	PF00510	Cytochrome c oxidase subunit III (COX3)	Cytochrome c oxidase subunit III		Domain
D, N [auth O]	PF02936	Cytochrome c oxidase subunit IV (COX4)	Cytochrome c oxidase subunit IV	-	Family
D, N [auth O]	PF02167	Cytochrome C1 family (Cytochrom_C1)	Cytochrome C1 family	-	Family
E, O [auth P]	PF02921	Ubiquinol cytochrome reductase transmembrane region (UCR_TM)	Ubiquinol cytochrome reductase transmembrane region	-	Family
E, O [auth P]	PF00355	Rieske [2Fe-2S] domain (Rieske)	Rieske [2Fe-2S] domain	The rieske domain has a [2Fe-2S] centre. Two conserved cysteines coordinate one Fe ion, while the other Fe ion is coordinated by two conserved histidines. In hyperthermophilic archaea there is a SKTPCX(2-3)C motif at the C-terminus. The cysteines in ...	The rieske domain has a [2Fe-2S] centre. Two conserved cysteines coordinate one Fe ion, while the other Fe ion is coordinated by two conserved histidines. In hyperthermophilic archaea there is a SKTPCX(2-3)C motif at the C-terminus. The cysteines in this motif form a disulphide bridge, which stabilises the protein [4].	Domain
G, Q [auth R]	PF02939	UcrQ family (UcrQ)	UcrQ family	-	Family
I [auth J], S [auth U]	PF05365	Cytochrome b-c1 complex subunit 9 (UCR_UQCRX_QCR9)	Cytochrome b-c1 complex subunit 9	-	Family
V [auth I]	PF02937	Cytochrome c oxidase subunit VIc (COX6C)	Cytochrome c oxidase subunit VIc	-	Family
H, R [auth S]	PF02320	Ubiquinol-cytochrome C reductase hinge protein (UCR_hinge)	Ubiquinol-cytochrome C reductase hinge protein	The ubiquinol-cytochrome C reductase complex (cytochrome bc1 complex) is a respiratory multienzyme complex [1]. This Pfam family represents the 'hinge' protein of the complex which is thought to mediate formation of the cytochrome c1 and cytochrome c ...	The ubiquinol-cytochrome C reductase complex (cytochrome bc1 complex) is a respiratory multienzyme complex [1]. This Pfam family represents the 'hinge' protein of the complex which is thought to mediate formation of the cytochrome c1 and cytochrome c complex.	Domain
H, R [auth S]	PF02297	Cytochrome oxidase c subunit VIb (COX6B)	Cytochrome oxidase c subunit VIb	Cytochrome c oxidase, a 13 sub-unit complex, EC:1.9.3.1 is the terminal oxidase in the mitochondrial electron transport chain. This family is composed of the potentially heme-binding subunit IVb of the oxidase.	Domain
B, L [auth M]	PF00116	Cytochrome C oxidase subunit II, periplasmic domain (COX2)	Cytochrome C oxidase subunit II, periplasmic domain		Domain
B, L [auth M]	PF05193	Peptidase M16 inactive domain (Peptidase_M16_C)	Peptidase M16 inactive domain	Peptidase M16 consists of two structurally related domains. One is the active peptidase, whereas the other is inactive. The two domains hold the substrate like a clamp [1].	Domain
B, L [auth M]	PF02285	Cytochrome oxidase c subunit VIII (COX8)	Cytochrome oxidase c subunit VIII	-	Family
B, L [auth M]	PF02790	Cytochrome C oxidase subunit II, transmembrane domain (COX2_TM)	Cytochrome C oxidase subunit II, transmembrane domain	-	Family
B, L [auth M]	PF00675	Insulinase (Peptidase family M16) (Peptidase_M16)	Insulinase (Peptidase family M16)	-	Family
U [auth T]	PF09165	Ubiquinol-cytochrome c reductase 8 kDa, N-terminal (Ubiq-Cytc-red_N)	Ubiquinol-cytochrome c reductase 8 kDa, N-terminal	Members of this family adopt a structure consisting of many antiparallel beta sheets, with few alpha helices, in a non-globular arrangement. They are required for proper functioning of the respiratory chain [1].	Domain
J [auth K], T [auth V]	PF08997	Ubiquinol-cytochrome C reductase complex, 6.4kD protein (UCR_6-4kD)	Ubiquinol-cytochrome C reductase complex, 6.4kD protein	The ubiquinol-cytochrome C reductase complex (cytochrome bc1 complex) is an essential component of the mitochondrial cellular respiratory chain. This family represents the 6.4kD protein, which may be closely linked to the iron-sulphur protein in the ...	The ubiquinol-cytochrome C reductase complex (cytochrome bc1 complex) is an essential component of the mitochondrial cellular respiratory chain. This family represents the 6.4kD protein, which may be closely linked to the iron-sulphur protein in the complex and function as an iron-sulphur protein binding factor [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, K [auth L]	Cytochrome b-c1 complex subunit 1, mitochondrial	protein-containing complex binding binding ubiquitin protein ligase binding protein binding ubiquitin-like protein ligase binding enzyme binding cation binding ion binding metal ion binding small molecule binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport cytochrome complex assembly aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport cytochrome complex assembly protein-containing complex organization mitochondrial respiratory chain complex III assembly cellular component organization cellular component biogenesis organelle organization cellular component assembly respiratory chain complex III assembly mitochondrial respiratory chain complex assembly protein-containing complex assembly cellular component organization or biogenesis mitochondrion organization response to stimulus response to activity response to chemical response to nitrogen compound response to alkaloid	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
C, M [auth N]	Cytochrome b	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity protein-containing complex binding oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity protein-containing complex binding binding cation binding ion binding metal ion binding small molecule binding	response to stimulus response to chemical response to xenobiotic stimulus response to D-galactosamine response to oxygen-containing compound electron transport coupled proton transport transport proton transmembrane transport monoatomic ion transmembrane transport establishment of localization monoatomic cation transmembrane transport transmembrane transport localization energy coupled proton transmembrane transport, against electrochemical gradient response to stimulus response to chemical response to xenobiotic stimulus response to D-galactosamine response to oxygen-containing compound electron transport coupled proton transport transport proton transmembrane transport monoatomic ion transmembrane transport establishment of localization monoatomic cation transmembrane transport transmembrane transport localization energy coupled proton transmembrane transport, against electrochemical gradient monoatomic ion transport cellular process monoatomic cation transport aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process mitochondrial ATP synthesis coupled electron transport response to copper ion response to metal ion response to mercury ion response to calcium ion response to hormone response to endogenous stimulus response to peptide hormone response to nitrogen compound response to glucagon response to toxic substance response to nutrient levels response to cobalamin response to nutrient response to vitamin response to alcohol response to ethanol response to decreased oxygen levels response to hypoxia response to stress response to oxygen levels response to abiotic stimulus developmental process animal organ regeneration anatomical structure development animal organ development regeneration response to cadmium ion response to hyperoxia response to increased oxygen levels	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
D, N [auth O]	Cytochrome c1, heme protein, mitochondrial	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding tetrapyrrole binding heme binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to stimulus response to hormone response to chemical response to endogenous stimulus response to peptide hormone response to oxygen-containing compound response to nitrogen compound response to glucagon	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
E, O [auth P]	Cytochrome b-c1 complex subunit Rieske, mitochondrial	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding protein-containing complex binding cation binding ion binding metal ion binding	response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to hormone response to endogenous stimulus	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
F, P [auth Q]	Cytochrome b-c1 complex subunit 7	protein-containing complex binding binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
G, Q [auth R]	Cytochrome b-c1 complex subunit 8	-	developmental process multicellular organismal process head development animal organ development brain development nervous system development cerebellar cortex development multicellular organism development cerebellar Purkinje cell layer development cerebellum development central nervous system development metencephalon development anatomical structure development hindbrain development developmental process multicellular organismal process head development animal organ development brain development nervous system development cerebellar cortex development multicellular organism development cerebellar Purkinje cell layer development cerebellum development central nervous system development metencephalon development anatomical structure development hindbrain development system development midbrain development aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport forebrain development pallium development telencephalon development hippocampus development limbic system development pyramidal neuron development cellular developmental process central nervous system neuron development cell development central nervous system neuron differentiation neurogenesis neuron differentiation cell differentiation forebrain generation of neurons generation of neurons forebrain neuron development neuron development forebrain neuron differentiation pyramidal neuron differentiation pons development hypothalamus development diencephalon development subthalamus development thalamus development	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
I [auth J], S [auth U]	Cytochrome b-c1 complex subunit 9	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
V [auth I]	Cox7a2l protein	protein-macromolecule adaptor activity molecular adaptor activity	aerobic respiration cellular respiration oxidative phosphorylation regulation of biological process regulation of cellular process energy derivation by oxidation of organic compounds biological regulation regulation of generation of precursor metabolites and energy generation of precursor metabolites and energy regulation of cellular respiration regulation of aerobic respiration regulation of oxidative phosphorylation metabolic process cellular process aerobic respiration cellular respiration oxidative phosphorylation regulation of biological process regulation of cellular process energy derivation by oxidation of organic compounds biological regulation regulation of generation of precursor metabolites and energy generation of precursor metabolites and energy regulation of cellular respiration regulation of aerobic respiration regulation of oxidative phosphorylation metabolic process cellular process regulation of metabolic process aerobic electron transport chain ATP synthesis coupled electron transport electron transport chain mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain mitochondrial ATP synthesis coupled electron transport mitochondrial respirasome assembly protein-containing complex organization cellular component organization cellular component biogenesis organelle organization cellular component assembly mitochondrial respiratory chain complex assembly protein-containing complex assembly cellular component organization or biogenesis mitochondrion organization	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
W [auth a]	Cytochrome c oxidase subunit 1	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding tetrapyrrole binding heme binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	response to electrical stimulus response to stimulus response to abiotic stimulus response to copper ion response to metal ion response to chemical aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process cellular process generation of precursor metabolites and energy response to decreased oxygen levels response to electrical stimulus response to stimulus response to abiotic stimulus response to copper ion response to metal ion response to chemical aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process cellular process generation of precursor metabolites and energy response to decreased oxygen levels response to hypoxia response to stress response to oxygen levels response to oxidative stress respiratory electron transport chain electron transport chain developmental process multicellular organismal process head development animal organ development brain development nervous system development multicellular organism development cerebellum development central nervous system development metencephalon development anatomical structure development hindbrain development system development	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
X [auth b]	Cytochrome c oxidase subunit 2	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding transition metal ion binding copper ion binding ion binding binding metal ion binding small molecule binding	response to decreased oxygen levels response to stimulus response to hypoxia response to stress response to oxygen levels response to abiotic stimulus developmental process regulation of body fluid levels secretion transport mammary gland development gland development animal organ development biological regulation response to decreased oxygen levels response to stimulus response to hypoxia response to stress response to oxygen levels response to abiotic stimulus developmental process regulation of body fluid levels secretion transport mammary gland development gland development animal organ development biological regulation establishment of localization body fluid secretion localization anatomical structure development lactation regulation of biological quality aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds respiratory electron transport chain ATP synthesis coupled electron transport electron transport chain metabolic process cellular process generation of precursor metabolites and energy response to alcohol response to chemical response to oxygen-containing compound response to ethanol	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
Y [auth c]	Cytochrome c oxidase subunit 3	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity	respiratory chain complex IV assembly cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds respiratory chain complex IV assembly cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
BA [auth f]	Cytochrome c oxidase subunit 5B, mitochondrial	cation binding ion binding binding metal ion binding small molecule binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
DA [auth h]	Cytochrome c oxidase subunit 6B1	-	aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
EA [auth i]	Cytochrome c oxidase subunit 6C	-	aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process cellular process generation of precursor metabolites and energy	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
FA [auth k]	Cytochrome c oxidase subunit 7B, mitochondrial	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport developmental process aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport developmental process multicellular organism development multicellular organismal process central nervous system development anatomical structure development nervous system development system development	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
GA [auth l]	Cytochrome c oxidase subunit 7C, mitochondrial	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
HA [auth m]	Cytochrome c oxidase subunit 8B, mitochondrial	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
H, R [auth S]	Cytochrome b-c1 complex subunit 6, mitochondrial	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity protein-containing complex binding binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
B, L [auth M]	Cytochrome b-c1 complex subunit 2, mitochondrial	protein-containing complex binding binding peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity cation binding ion binding metal ion binding small molecule binding	response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport proteolysis primary metabolic process protein metabolic process macromolecule metabolic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen
CA [auth g]	Cytochrome c oxidase subunit 6A2, mitochondrial	oxidoreductase activity catalytic activity enzyme regulator activity molecular function regulator activity	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
AA [auth e]	Cytochrome c oxidase subunit 5A, mitochondrial	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding ion binding binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding ion binding binding metal ion binding small molecule binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
Z [auth d]	Cytochrome c oxidase subunit 4 isoform 1, mitochondrial	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to nutrient levels aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, cytochrome c to oxygen respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to nutrient levels response to stimulus response to chemical response to nutrient	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle mitochondrion organelle intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle mitochondrion organelle intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex respiratory chain complex IV transporter complex
U [auth T]	Cytochrome b-c1 complex subunit 9	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding protein-containing complex binding cation binding ion binding metal ion binding	response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process response to stimulus response to chemical response to xenobiotic stimulus aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport response to hormone response to endogenous stimulus	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane myelin sheath respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
J [auth K], T [auth V]	Cytochrome b-c1 complex subunit 10	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, K [auth L]	IPR007863	Peptidase M16, C-terminal	Domain
A, K [auth L]	IPR011249	Metalloenzyme, LuxS/M16 peptidase-like	Homologous Superfamily
A, K [auth L]	IPR050361	Mitochondrial Processing Peptidase/Ubiquinol-cytochrome c Reductase Complex	Family
A, K [auth L]	IPR011765	Peptidase M16, N-terminal	Domain
C, M [auth N]	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
C, M [auth N]	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
C, M [auth N]	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
C, M [auth N]	IPR005798	Cytochrome b/b6, C-terminal	Domain
C, M [auth N]	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
C, M [auth N]	IPR005797	Cytochrome b/b6, N-terminal domain	Domain
C, M [auth N]	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
C, M [auth N]	IPR030689	Cytochrome b	Family
D, N [auth O]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
D, N [auth O]	IPR002326	Cytochrome c1	Family
D, N [auth O]	IPR009056	Cytochrome c-like domain	Domain
D, N [auth O]	IPR021157	Cytochrome c1, transmembrane anchor, C-terminal	Homologous Superfamily
E, O [auth P]	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
E, O [auth P]	IPR014349	Rieske iron-sulphur protein	Family
E, O [auth P]	IPR011070	Globular protein, non-globular alpha/beta subunit	Homologous Superfamily
E, O [auth P]	IPR004192	Cytochrome b-c1 complex subunit Rieske, transmembrane domain	Domain
E, O [auth P]	IPR015248	Ubiquinol-cytochrome c reductase iron-sulphur subunit, N-terminal	Domain
E, O [auth P]	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
E, O [auth P]	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
E, O [auth P]	IPR037008	Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily	Homologous Superfamily
E, O [auth P]	IPR006317	Ubiquinol-cytochrome c reductase, iron-sulphur subunit	Domain
F, P [auth Q]	IPR003197	Cytochrome b-c1 complex subunit 7	Family
F, P [auth Q]	IPR036544	Cytochrome b-c1 complex subunit 7 superfamily	Homologous Superfamily
G, Q [auth R]	IPR004205	Cytochrome b-c1 complex subunit 8	Family
G, Q [auth R]	IPR036642	Cytochrome b-c1 complex subunit 8 superfamily	Homologous Superfamily
I [auth J], S [auth U]	IPR008027	Cytochrome b-c1 complex subunit 9	Family
I [auth J], S [auth U]	IPR036656	Cytochrome b-c1 complex subunit 9 superfamily	Homologous Superfamily
V [auth I]	IPR003177	Cytochrome c oxidase subunit VIIa, metazoa	Family
V [auth I]	IPR017267	Cytochrome c oxidase subunit VIIa-related, mitochondrial	Family
V [auth I]	IPR036539	Cytochrome c oxidase, subunit VIIa superfamily	Homologous Superfamily
V [auth I]	IPR039297	Cytochrome c oxidase subunit VII	Family
W [auth a]	IPR036927	Cytochrome c oxidase-like, subunit I superfamily	Homologous Superfamily
W [auth a]	IPR000883	Cytochrome c oxidase subunit I	Family
W [auth a]	IPR023615	Cytochrome c oxidase, subunit I, copper-binding site	Binding Site
W [auth a]	IPR023616	Cytochrome c oxidase-like, subunit I domain	Domain
W [auth a]	IPR033944	Cytochrome c oxidase subunit I domain	Domain
X [auth b]	IPR011759	Cytochrome C oxidase subunit II, transmembrane domain	Domain
X [auth b]	IPR036257	Cytochrome C oxidase subunit II, transmembrane domain superfamily	Homologous Superfamily
X [auth b]	IPR034210	Cytochrome c oxidase subunit 2, C-terminal	Domain
X [auth b]	IPR045187	Cytochrome c/quinol oxidase subunit II	Family
X [auth b]	IPR002429	Cytochrome c oxidase subunit II-like C-terminal	Domain
X [auth b]	IPR008972	Cupredoxin	Homologous Superfamily
X [auth b]	IPR001505	Copper centre Cu(A)	Binding Site
X [auth b]	IPR014222	Cytochrome c oxidase, subunit II	Domain
Y [auth c]	IPR035973	Cytochrome c oxidase subunit III-like superfamily	Homologous Superfamily
Y [auth c]	IPR013833	Cytochrome c oxidase, subunit III, 4-helical bundle	Homologous Superfamily
Y [auth c]	IPR000298	Cytochrome c oxidase subunit III-like	Domain
Y [auth c]	IPR033945	Cytochrome c oxidase subunit III domain	Domain
Y [auth c]	IPR024791	Cytochrome c oxidase subunit III	Family
BA [auth f]	IPR002124	Cytochrome c oxidase, subunit Vb	Family
BA [auth f]	IPR036972	Cytochrome c oxidase, subunit Vb superfamily	Homologous Superfamily
DA [auth h]	IPR036549	Cytochrome c oxidase subunit 6B/Cytochrome c oxidase assembly factor 6-like superfamily	Homologous Superfamily
DA [auth h]	IPR048280	Cytochrome oxidase c subunit VIb-like	Family
DA [auth h]	IPR003213	Cytochrome c oxidase, subunit VIb	Family
EA [auth i]	IPR037169	Mitochondrial cytochrome c oxidase subunit VIc/VIIs superfamily	Homologous Superfamily
EA [auth i]	IPR051389	Cytochrome c oxidase subunit VIc	Family
EA [auth i]	IPR034884	Mitochondrial cytochrome c oxidase subunit VIc/VIIs	Family
FA [auth k]	IPR023272	Cytochrome C oxidase, subunit VIIB domain superfamily	Homologous Superfamily
FA [auth k]	IPR008433	Cytochrome C oxidase, subunit VIIB	Family
GA [auth l]	IPR036636	Cytochrome c oxidase subunit VIIc superfamily	Homologous Superfamily
GA [auth l]	IPR004202	Cytochrome c oxidase subunit VIIc	Family
HA [auth m]	IPR003205	Cytochrome c oxidase, subunit 8	Family
HA [auth m]	IPR036548	Cytochrome c oxidase, subunit 8 superfamily	Homologous Superfamily
H, R [auth S]	IPR003422	Cytochrome b-c1 complex, subunit 6	Family
H, R [auth S]	IPR023184	Ubiquinol-cytochrome C reductase hinge domain	Domain
H, R [auth S]	IPR036811	Ubiquinol-cytochrome C reductase hinge domain superfamily	Homologous Superfamily
B, L [auth M]	IPR007863	Peptidase M16, C-terminal	Domain
B, L [auth M]	IPR011249	Metalloenzyme, LuxS/M16 peptidase-like	Homologous Superfamily
B, L [auth M]	IPR050361	Mitochondrial Processing Peptidase/Ubiquinol-cytochrome c Reductase Complex	Family
B, L [auth M]	IPR011765	Peptidase M16, N-terminal	Domain
B, L [auth M]	IPR001431	Peptidase M16, zinc-binding site	Binding Site
CA [auth g]	IPR018507	Cytochrome c oxidase, subunit VIa, conserved site	Conserved Site
CA [auth g]	IPR036418	Cytochrome c oxidase, subunit VIa superfamily	Homologous Superfamily
CA [auth g]	IPR001349	Cytochrome c oxidase, subunit VIa	Family
AA [auth e]	IPR003204	Cytochrome c oxidase, subunit Va/VI	Family
AA [auth e]	IPR036545	Cytochrome c oxidase, subunit Va/VI superfamily	Homologous Superfamily
Z [auth d]	IPR004203	Cytochrome c oxidase subunit IV family	Family
Z [auth d]	IPR013288	Cytochrome c oxidase subunit IV	Family
Z [auth d]	IPR036639	Cytochrome c oxidase subunit IV superfamily	Homologous Superfamily
U [auth T]	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
U [auth T]	IPR014349	Rieske iron-sulphur protein	Family
U [auth T]	IPR011070	Globular protein, non-globular alpha/beta subunit	Homologous Superfamily
U [auth T]	IPR004192	Cytochrome b-c1 complex subunit Rieske, transmembrane domain	Domain
U [auth T]	IPR015248	Ubiquinol-cytochrome c reductase iron-sulphur subunit, N-terminal	Domain
U [auth T]	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
U [auth T]	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
U [auth T]	IPR037008	Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily	Homologous Superfamily
U [auth T]	IPR006317	Ubiquinol-cytochrome c reductase, iron-sulphur subunit	Domain
J [auth K], T [auth V]	IPR029027	Single alpha-helix domain superfamily	Homologous Superfamily
J [auth K], T [auth V]	IPR015089	Cytochrome b-c1 complex subunit 10	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, AA [auth e], B, BA [auth f], C A, AA [auth e], B, BA [auth f], C, CA [auth g], D, DA [auth h], E, EA [auth i], F, FA [auth k], G, GA [auth l], H, HA [auth m], I [auth J], J [auth K], K [auth L], L [auth M], M [auth N], N [auth O], O [auth P], P [auth Q], Q [auth R], R [auth S], S [auth U], T [auth V], U [auth T], V [auth I], W [auth a], X [auth b], Y [auth c], Z [auth d]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex IV (cytochrome c oxidase)	Respiratory supercomplexes III-IV

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, AA [auth e], B, BA [auth f], C A, AA [auth e], B, BA [auth f], C, CA [auth g], D, DA [auth h], E, EA [auth i], F, FA [auth k], G, GA [auth l], H, HA [auth m], I [auth J], J [auth K], K [auth L], L [auth M], M [auth N], N [auth O], O [auth P], P [auth Q], Q [auth R], R [auth S], S [auth U], T [auth V], U [auth T], V [auth I], W [auth a], X [auth b], Y [auth c], Z [auth d]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, AA [auth e], B, BA [auth f], C A, AA [auth e], B, BA [auth f], C, CA [auth g], D, DA [auth h], E, EA [auth i], F, FA [auth k], G, GA [auth l], H, HA [auth m], I [auth J], J [auth K], K [auth L], L [auth M], M [auth N], N [auth O], O [auth P], P [auth Q], Q [auth R], R [auth S], S [auth U], T [auth V], U [auth T], V [auth I], W [auth a], X [auth b], Y [auth c], Z [auth d]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Supercomplexes (Respirasome)	ETC Super Complex comprised of ETC complexes CIII₂CIV, intermediate locked conformation