Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0020037 | molecular_function | heme binding |
| B | 0020037 | molecular_function | heme binding |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 19 |
| Details | BINDING SITE FOR RESIDUE HEM A 1 |
| Chain | Residue |
| A | HOH29 |
| A | VAL111 |
| A | HIS112 |
| A | VAL115 |
| A | TYR117 |
| A | LEU121 |
| A | HOH152 |
| A | HOH156 |
| A | HOH165 |
| A | HOH173 |
| B | LYS51 |
| A | TYR85 |
| A | HIS89 |
| A | PRO90 |
| A | GLY91 |
| A | GLU95 |
| A | LEU96 |
| A | GLY104 |
| A | PHE108 |
| site_id | AC2 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO4 A 138 |
| Chain | Residue |
| A | HOH10 |
| A | GLY92 |
| A | GLU93 |
| A | ASP94 |
| site_id | AC3 |
| Number of Residues | 16 |
| Details | BINDING SITE FOR RESIDUE HEM B 2 |
| Chain | Residue |
| A | LYS51 |
| B | TYR85 |
| B | HIS89 |
| B | PRO90 |
| B | GLY91 |
| B | GLU95 |
| B | LEU96 |
| B | LEU107 |
| B | VAL111 |
| B | HIS112 |
| B | VAL115 |
| B | TYR117 |
| B | MET120 |
| B | LEU121 |
| B | HOH167 |
| B | HOH176 |
| site_id | AC4 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO4 B 138 |
| Chain | Residue |
| B | HOH14 |
| B | GLY92 |
| B | GLU93 |
| B | ASP94 |
Functional Information from PROSITE/UniProt
| site_id | PS00191 |
| Number of Residues | 8 |
| Details | CYTOCHROME_B5_1 Cytochrome b5 family, heme-binding domain signature. YMEYHPGG |
| Chain | Residue | Details |
| A | TYR85-GLY92 | |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 4 |
| Details | BINDING: axial binding residue |
| Chain | Residue | Details |
| A | SER83 | |
| A | GLU106 | |
| B | SER83 | |
| B | GLU106 | |
