Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B | Globin-1 | polymer | 146 | 15967.3 | 2 | UniProt (P02213) | Scapharca inaequivalvis (Ark clam) | Globin I, HbI, Dimeric hemoglobin |
| 2 | A, B | PROTOPORPHYRIN IX CONTAINING FE | non-polymer | 616.5 | 2 | Chemie (HEM) | |||
| 3 | A, B | CARBON MONOXIDE | non-polymer | 28.0 | 2 | Chemie (CMO) | |||
| 4 | A, B | XENON | non-polymer | 131.3 | 6 | Chemie (XE) | |||
| 5 | water | water | 18.0 | 432 | Chemie (HOH) |
