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 301 |
| Chain | Residue |
| A | HOH334 |
| B | HOH210 |
| C | HOH214 |
| C | HOH220 |
| C | HOH221 |
| C | HOH222 |
| site_id | AC2 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE MG D 303 |
| Chain | Residue |
| C | HOH216 |
| D | HOH318 |
| D | HOH319 |
| A | HOH333 |
| A | HOH364 |
| C | HOH213 |
| site_id | AC3 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE MG A 304 |
| Chain | Residue |
| A | HOH335 |
| A | HOH346 |
| A | HOH347 |
| A | HOH357 |
| A | HOH358 |
| A | HOH359 |
| site_id | AC4 |
| Number of Residues | 19 |
| Details | BINDING SITE FOR RESIDUE HEM A 201 |
| Chain | Residue |
| A | GLY-1 |
| A | SER0 |
| A | ASP1 |
| A | PRO2 |
| A | MET23 |
| A | LEU32 |
| A | PHE35 |
| A | HIS39 |
| A | PRO40 |
| A | VAL45 |
| A | LEU46 |
| A | GLN49 |
| A | PHE58 |
| A | VAL61 |
| A | HIS63 |
| A | SER64 |
| A | ALA67 |
| A | SER71 |
| A | HOH320 |
| site_id | AC5 |
| Number of Residues | 17 |
| Details | BINDING SITE FOR RESIDUE HEM B 201 |
| Chain | Residue |
| B | MET23 |
| B | LEU32 |
| B | PHE35 |
| B | HIS39 |
| B | PRO40 |
| B | GLY41 |
| B | VAL45 |
| B | LEU46 |
| B | GLN49 |
| B | ALA54 |
| B | PHE58 |
| B | VAL61 |
| B | HIS63 |
| B | SER64 |
| B | ALA67 |
| C | SER57 |
| C | ASP60 |
| 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 |
| C | MET23 |
| C | LEU32 |
| C | PHE35 |
| C | HIS39 |
| C | PRO40 |
| C | GLY41 |
| C | VAL45 |
| C | LEU46 |
| C | GLN49 |
| C | ALA54 |
| C | SER57 |
| C | PHE58 |
| C | HIS63 |
| C | SER64 |
| C | ALA67 |
| C | SER71 |
| C | HOH202 |
| C | HOH217 |
| C | HOH224 |
| site_id | AC7 |
| Number of Residues | 14 |
| Details | BINDING SITE FOR RESIDUE HEM D 201 |
| Chain | Residue |
| D | LEU32 |
| D | PHE35 |
| D | HIS39 |
| D | PRO40 |
| D | GLY41 |
| D | VAL45 |
| D | LEU46 |
| D | ALA54 |
| D | PHE58 |
| D | VAL61 |
| D | HIS63 |
| D | SER64 |
| D | ALA67 |
| D | SER71 |
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 | |
