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 | 6 |
| Details | BINDING SITE FOR RESIDUE MG A 88 |
| Chain | Residue |
| A | HOH202 |
| B | HOH202 |
| B | HOH203 |
| C | HOH202 |
| C | HOH203 |
| C | HOH204 |
| site_id | AC2 |
| Number of Residues | 7 |
| Details | BINDING SITE FOR RESIDUE MG C 88 |
| Chain | Residue |
| C | HOH205 |
| C | HOH206 |
| D | HOH202 |
| D | HOH203 |
| A | HOH203 |
| A | HOH204 |
| C | GLU69 |
| site_id | AC3 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE MG A 89 |
| Chain | Residue |
| A | HOH205 |
| A | HOH206 |
| A | HOH207 |
| A | HOH208 |
| A | HOH209 |
| A | HOH210 |
| site_id | AC4 |
| Number of Residues | 16 |
| Details | BINDING SITE FOR RESIDUE HEM A 201 |
| Chain | Residue |
| A | ASP1 |
| A | PRO2 |
| A | MET23 |
| A | PHE35 |
| A | HIS39 |
| A | PRO40 |
| A | GLY41 |
| A | VAL45 |
| A | LEU46 |
| A | PHE58 |
| A | VAL61 |
| A | HIS63 |
| A | SER64 |
| A | MET70 |
| A | LEU71 |
| A | HOH227 |
| site_id | AC5 |
| Number of Residues | 15 |
| Details | BINDING SITE FOR RESIDUE HEM B 201 |
| Chain | Residue |
| B | PHE35 |
| B | HIS39 |
| B | PRO40 |
| B | GLY41 |
| B | VAL45 |
| B | LEU46 |
| B | PHE58 |
| B | VAL61 |
| B | HIS63 |
| B | SER64 |
| B | ALA67 |
| B | MET70 |
| B | LEU71 |
| C | SER57 |
| C | HEM201 |
| site_id | AC6 |
| Number of Residues | 23 |
| Details | BINDING SITE FOR RESIDUE HEM C 201 |
| Chain | Residue |
| B | PRO40 |
| B | GLY42 |
| B | GLU43 |
| B | GLU44 |
| B | HEM201 |
| C | MET23 |
| C | ILE25 |
| C | PHE35 |
| C | HIS39 |
| C | PRO40 |
| C | GLY41 |
| C | VAL45 |
| C | LEU46 |
| C | PHE58 |
| C | VAL61 |
| C | HIS63 |
| C | SER64 |
| C | ALA67 |
| C | MET70 |
| C | LEU71 |
| C | HOH207 |
| C | HOH219 |
| C | HOH225 |
| site_id | AC7 |
| Number of Residues | 15 |
| Details | BINDING SITE FOR RESIDUE HEM D 201 |
| Chain | Residue |
| D | PHE35 |
| D | HIS39 |
| D | PRO40 |
| D | GLY41 |
| D | VAL45 |
| D | LEU46 |
| D | GLN49 |
| D | PHE58 |
| D | VAL61 |
| D | HIS63 |
| D | SER64 |
| D | ALA67 |
| D | MET70 |
| D | LEU71 |
| D | HOH244 |
Functional Information from PROSITE/UniProt
| site_id | PS00191 |
| Number of Residues | 8 |
| Details | CYTOCHROME_B5_1 Cytochrome b5 family, heme-binding domain signature. FLSEHPGG |
| Chain | Residue | Details |
| A | PHE35-GLY42 | |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 8 |
| Details | BINDING: axial binding residue |
| Chain | Residue | Details |
| A | HIS39 | |
| A | HIS63 | |
| B | HIS39 | |
| B | HIS63 | |
| C | HIS39 | |
| C | HIS63 | |
| D | HIS39 | |
| D | HIS63 | |
| Chain | Residue | Details |
| A | LYS14 | |
| B | LYS14 | |
| C | LYS14 | |
| D | LYS14 | |
| Chain | Residue | Details |
| A | SER64 | |
| B | SER64 | |
| C | SER64 | |
| D | SER64 | |
