Functional Information from GO Data
| Chain | GOid | namespace | contents |
| A | 0005576 | cellular_component | extracellular region |
| A | 0042311 | biological_process | vasodilation |
| A | 0046872 | molecular_function | metal ion binding |
| A | 0051381 | molecular_function | histamine binding |
| A | 0070026 | molecular_function | nitric oxide binding |
| B | 0005576 | cellular_component | extracellular region |
| B | 0042311 | biological_process | vasodilation |
| B | 0046872 | molecular_function | metal ion binding |
| B | 0051381 | molecular_function | histamine binding |
| B | 0070026 | molecular_function | nitric oxide binding |
Functional Information from PDB Data
| site_id | AC1 |
| Number of Residues | 4 |
| Details | BINDING SITE FOR RESIDUE PO4 A 301 |
| Chain | Residue |
| A | ASP113 |
| A | SER115 |
| A | SER116 |
| A | HOH344 |
| site_id | AC2 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE PO4 B 302 |
| Chain | Residue |
| B | HOH378 |
| B | ASP113 |
| B | SER116 |
| B | LYS148 |
| B | HOH323 |
| B | HOH327 |
| site_id | AC3 |
| Number of Residues | 16 |
| Details | BINDING SITE FOR RESIDUE HEM A 302 |
| Chain | Residue |
| A | VAL25 |
| A | TYR28 |
| A | ASP34 |
| A | TYR40 |
| A | LEU57 |
| A | HIS59 |
| A | PHE68 |
| A | ASP70 |
| A | PHE86 |
| A | LYS88 |
| A | TYR105 |
| A | LEU123 |
| A | LYS125 |
| A | LEU133 |
| A | HSM303 |
| A | HOH312 |
| site_id | AC4 |
| Number of Residues | 6 |
| Details | BINDING SITE FOR RESIDUE HSM A 303 |
| Chain | Residue |
| A | ASP30 |
| A | GLU32 |
| A | LEU123 |
| A | LEU130 |
| A | HEM302 |
| A | HOH304 |
| site_id | AC5 |
| Number of Residues | 13 |
| Details | BINDING SITE FOR RESIDUE HEM B 303 |
| Chain | Residue |
| B | TYR28 |
| B | TYR40 |
| B | LEU57 |
| B | HIS59 |
| B | PHE68 |
| B | ASP70 |
| B | PHE86 |
| B | LYS88 |
| B | TYR105 |
| B | LEU123 |
| B | LYS125 |
| B | HSM304 |
| B | HOH313 |
| site_id | AC6 |
| Number of Residues | 5 |
| Details | BINDING SITE FOR RESIDUE HSM B 304 |
| Chain | Residue |
| B | ASP30 |
| B | GLU32 |
| B | LEU130 |
| B | HEM303 |
| B | HOH305 |
Functional Information from SwissProt/UniProt
| site_id | SWS_FT_FI1 |
| Number of Residues | 2 |
| Details | BINDING: proximal binding residue |
| Chain | Residue | Details |
| A | HIS59 | |
| B | HIS59 | |
