4AIX | pdb_00004aix

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d4aixd1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d4aixd2	Artifacts	Tags	Tags	Tags	C-terminal Tags	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d4aixc1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d4aixc2	Artifacts	Tags	Tags	Tags	C-terminal Tags	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4aixb1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4aixb2	Artifacts	Tags	Tags	Tags	C-terminal Tags	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4aixa1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d4aixa2	Artifacts	Tags	Tags	Tags	C-terminal Tags	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	V-set	e4aixD1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (develop294)
C	Ig_2	e4aixC2	A: alpha bundles	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: Ig_2	ECOD (develop294)
B	Ig_2	e4aixB2	A: alpha bundles	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: Ig_2	ECOD (develop294)
A	V-set	e4aixA1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (develop294)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A, B, C, D	IG LAMBDA CHAIN V-IV REGION BAU	V-LAMBDA	Homo sapiens (human)	IGLV3-101, IGLJ201, IGLJ302, IGLJ301	V-DOMAIN V-LAMBDA	IG	(V-LAMBDA)	IMGT (202610-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A, B, C, D	Light Chain	IGLV3	Lambda	-	SAbDab (2026-03-20)

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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