HEM Query on HEM
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| F [auth A], I [auth B], K [auth C], N [auth D] | PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L | ![](https://cdn.rcsb.org/images/ccd/unlabeled/H/HEM.svg) | |
B78 Query on B78
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| G [auth A], L [auth C] | 4-[(5-methoxy-2-methylphenoxy)methyl]pyridine C14 H15 N O2 MBHBRRBLXCXQKV-UHFFFAOYSA-N | ![](https://cdn.rcsb.org/images/ccd/unlabeled/B/B78.svg) | |
SO4 Query on SO4
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| O [auth D] | SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L | ![](https://cdn.rcsb.org/images/ccd/unlabeled/S/SO4.svg) | |
OXY Query on OXY
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| E [auth A], H [auth B], J [auth C], M [auth D] | OXYGEN MOLECULE O2 MYMOFIZGZYHOMD-UHFFFAOYSA-N | ![](https://cdn.rcsb.org/images/ccd/unlabeled/O/OXY.svg) | |