Entity
| Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| A | Myoglobin | polymer | 154 | 17404.2 | 1 | Physeter catodon (sperm whale)@PDBj | ||
| SULFATE ION | non-polymer | 96.1 | 2 | |||||
| PROTOPORPHYRIN IX CONTAINING FE | non-polymer | 616.5 | 1 | |||||
| water | water | 18.0 | 239 |
