Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0020037 | molecular_function | heme binding |
| B | 0020037 | molecular_function | heme binding |
| C | 0020037 | molecular_function | heme binding |
| D | 0020037 | molecular_function | heme binding |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 14 |
| Details | BINDING SITE FOR RESIDUE HEM A 201 |
| Chain | Residue |
| A | ILE34 |
| A | HIS71 |
| A | VAL75 |
| A | TYR79 |
| B | GLU65 |
| B | LYS77 |
| A | PHE44 |
| A | HIS48 |
| A | PRO49 |
| A | GLY50 |
| A | ALA54 |
| A | GLU66 |
| A | PHE67 |
| A | LEU70 |
| site_id | AC2 |
| Number of Residues | 20 |
| Details | BINDING SITE FOR RESIDUE HEM B 201 |
| Chain | Residue |
| A | LEU57 |
| A | GLU66 |
| B | ILE34 |
| B | LEU41 |
| B | PHE44 |
| B | HIS48 |
| B | PRO49 |
| B | GLY50 |
| B | ALA54 |
| B | PHE58 |
| B | ALA63 |
| B | PHE67 |
| B | LEU70 |
| B | HIS71 |
| B | VAL75 |
| B | TYR79 |
| C | PRO82 |
| D | ARG14 |
| D | LYS90 |
| D | HOH2004 |
| site_id | AC3 |
| Number of Residues | 16 |
| Details | BINDING SITE FOR RESIDUE HEM C 201 |
| Chain | Residue |
| A | ASP15 |
| A | LYS90 |
| C | PHE44 |
| C | HIS48 |
| C | PRO49 |
| C | GLY50 |
| C | ALA54 |
| C | ILE55 |
| C | PHE58 |
| C | PHE67 |
| C | HIS71 |
| C | PRO72 |
| C | TYR79 |
| C | LEU80 |
| D | GLU65 |
| D | PRO82 |
| site_id | AC4 |
| Number of Residues | 19 |
| Details | BINDING SITE FOR RESIDUE HEM D 201 |
| Chain | Residue |
| A | PRO82 |
| B | ASN12 |
| B | PRO13 |
| B | ARG14 |
| D | ILE34 |
| D | PHE44 |
| D | HIS48 |
| D | PRO49 |
| D | GLY50 |
| D | ALA54 |
| D | PHE58 |
| D | PHE67 |
| D | LEU70 |
| D | HIS71 |
| D | VAL75 |
| D | LEU76 |
| D | TYR79 |
| D | HOH2038 |
| D | HOH2039 |
| site_id | AC5 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO4 A 1092 |
| Chain | Residue |
| A | GLY51 |
| A | LYS52 |
| A | LYS53 |
| A | HOH2055 |
| site_id | AC6 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE SO4 B 1092 |
| Chain | Residue |
| B | GLY51 |
| B | LYS52 |
| B | LYS53 |
| B | HOH2041 |
| site_id | AC7 |
| Number of Residues | 3 |
| Details | BINDING SITE FOR RESIDUE SO4 C 1092 |
| Chain | Residue |
| C | GLY51 |
| C | LYS52 |
| C | LYS53 |
| site_id | AC8 |
| Number of Residues | 5 |
| Details | BINDING SITE FOR RESIDUE SO4 D 1092 |
| Chain | Residue |
| A | HOH2043 |
| D | LYS52 |
| D | LYS53 |
| D | HOH2024 |
| D | HOH2040 |
Functional Information from PROSITE/UniProt
| site_id | PS00191 |
| Number of Residues | 8 |
| Details | CYTOCHROME_B5_1 Cytochrome b5 family, heme-binding domain signature. FLPDHPGG |
| Chain | Residue | Details |
| A | PHE44-GLY51 | |
