Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, C | Hemoglobin subunit alpha | polymer | 141 | 15150.4 | 2 | UniProt (P69905) Pfam (PF00042) In PDB | Homo sapiens (Human) | Alpha-globin,Hemoglobin alpha chain |
| 2 | B, D | Hemoglobin subunit beta | polymer | 146 | 15890.2 | 2 | UniProt (P68871) Pfam (PF00042) In PDB | Homo sapiens (Human) | Beta-globin,Hemoglobin beta chain |
| 3 | A, B, C, D | PROTOPORPHYRIN IX CONTAINING FE | non-polymer | 616.5 | 4 | Chemie (HEM) | |||
| 4 | B, D | PHOSPHATE ION | non-polymer | 95.0 | 2 | Chemie (PO4) | |||
| 5 | water | water | 18.0 | 221 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 62081.1 | |
| Non-Polymers* | Number of molecules | 6 |
| Total formula weight | 2655.9 | |
| All* | Total formula weight | 64737.0 |
