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 | 24 |
| Details | BINDING SITE FOR RESIDUE HEM A 101 |
| Chain | Residue |
| A | PHE35 |
| A | PHE58 |
| A | VAL61 |
| A | HIS63 |
| A | SER64 |
| A | ALA67 |
| A | MET70 |
| A | LEU71 |
| A | HOH208 |
| A | HOH220 |
| A | HOH230 |
| A | HIS39 |
| A | HOH236 |
| A | HOH238 |
| B | GLU59 |
| B | HIS63 |
| B | ARG68 |
| A | PRO40 |
| A | GLY41 |
| A | VAL45 |
| A | LEU46 |
| A | GLN49 |
| A | ALA54 |
| A | SER57 |
| site_id | AC2 |
| Number of Residues | 27 |
| Details | BINDING SITE FOR RESIDUE HEM B 101 |
| Chain | Residue |
| B | MET23 |
| B | ILE25 |
| B | ARG34 |
| B | PHE35 |
| B | HIS39 |
| B | PRO40 |
| B | GLY41 |
| B | VAL45 |
| B | LEU46 |
| B | GLN49 |
| B | ALA54 |
| B | SER57 |
| B | PHE58 |
| B | VAL61 |
| B | HIS63 |
| B | SER64 |
| B | ALA67 |
| B | MET70 |
| B | LEU71 |
| B | GLN73 |
| B | TYR74 |
| B | HOH201 |
| B | HOH203 |
| B | HOH204 |
| B | HOH206 |
| B | HOH208 |
| B | HOH249 |
| site_id | AC3 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE NA B 102 |
| Chain | Residue |
| B | ARG34 |
| B | SER37 |
| B | HOH213 |
| B | HOH224 |
| B | HOH256 |
| B | HOH312 |
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 | 4 |
| Details | BINDING: axial binding residue |
| Chain | Residue | Details |
| A | HIS39 | |
| A | HIS63 | |
| B | HIS39 | |
| B | HIS63 | |
| Chain | Residue | Details |
| A | LYS14 | |
| B | LYS14 | |
| Chain | Residue | Details |
| A | SER64 | |
| B | SER64 | |
