Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0005783 | cellular_component | endoplasmic reticulum |
| A | 0005789 | cellular_component | endoplasmic reticulum membrane |
| A | 0005829 | cellular_component | cytosol |
| A | 0016020 | cellular_component | membrane |
| A | 0019899 | molecular_function | enzyme binding |
| A | 0020037 | molecular_function | heme binding |
| A | 0043231 | cellular_component | intracellular membrane-bounded organelle |
| A | 0046872 | molecular_function | metal ion binding |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 8 |
| Details | BINDING SITE FOR RESIDUE HEM A 400 |
| Chain | Residue |
| A | LEU30 |
| A | LEU37 |
| A | HIS44 |
| A | PRO45 |
| A | VAL50 |
| A | VAL66 |
| A | HIS68 |
| A | SER69 |
Functional Information from PROSITE/UniProt
| site_id | PS00191 |
| Number of Residues | 8 |
| Details | CYTOCHROME_B5_1 Cytochrome b5 family, heme-binding domain signature. FLEEHPGG |
| Chain | Residue | Details |
| A | PHE40-GLY47 | |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 22 |
| Details | TRANSMEM: Helical => ECO:0000255 |
| Chain | Residue | Details |
| A | TRP109-MET131 | |
| site_id | SWS_FT_FI2 |
| Number of Residues | 2 |
| Details | BINDING: axial binding residue |
| Chain | Residue | Details |
| A | HIS44 | |
| A | HIS68 | |
| Chain | Residue | Details |
| A | LYS7 | |
| A | LYS10 | |
| A | LYS19 | |
