1QSH
MAGNESIUM(II)-AND ZINC(II)-PROTOPORPHYRIN IX'S STABILIZE THE LOWEST OXYGEN AFFINITY STATE OF HUMAN HEMOGLOBIN EVEN MORE STRONGLY THAN DEOXYHEME
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, C | PROTEIN (HEMOGLOBIN ALPHA CHAIN) | polymer | 141 | 15150.4 | 2 | UniProt (P69905) Pfam (PF00042) In PDB | Homo sapiens (human) | |
| 2 | B, D | PROTEIN (HEMOGLOBIN BETA CHAIN) | polymer | 146 | 15890.2 | 2 | UniProt (P68871) Pfam (PF00042) In PDB | Homo sapiens (human) | |
| 3 | A, C | PROTOPORPHYRIN IX CONTAINING FE | non-polymer | 616.5 | 2 | Chemie (HEM) | |||
| 4 | B, D | PROTOPORPHYRIN IX CONTAINING MG | non-polymer | 584.9 | 2 | Chemie (HEG) | |||
| 5 | water | water | 18.0 | 400 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 62081.1 | |
| Non-Polymers* | Number of molecules | 4 |
| Total formula weight | 2402.9 | |
| All* | Total formula weight | 64484.0 |
