Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, C (A, C) | Nitrogenase molybdenum-iron protein alpha chain | polymer | 492 | 55363.0 | 2 | UniProt (P07328) Pfam (PF00148) | Azotobacter vinelandii | Dinitrogenase, Nitrogenase component I |
| 2 | B, D (B, D) | Nitrogenase molybdenum-iron protein beta chain | polymer | 523 | 59535.9 | 2 | UniProt (P07329) Pfam (PF11844) Pfam (PF00148) | Azotobacter vinelandii | Dinitrogenase, Nitrogenase component I |
| 3 | E, J (A, C) | 3-HYDROXY-3-CARBOXY-ADIPIC ACID | non-polymer | 206.2 | 2 | Chemie (HCA) | |||
| 4 | F, K (A, C) | iron-sulfur-molybdenum cluster with interstitial carbon | non-polymer | 787.5 | 2 | Chemie (ICS) | |||
| 5 | G, L (A, C) | FE(8)-S(7) CLUSTER | non-polymer | 671.2 | 2 | Chemie (CLF) | |||
| 6 | H, I (B) | FE (III) ION | non-polymer | 55.8 | 2 | Chemie (FE) | |||
| 7 | M, N, O, P (A, B, C, D) | water | water | 18.0 | 741 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 229797.8 | |
| Non-Polymers* | Number of molecules | 8 |
| Total formula weight | 3441.3 | |
| All* | Total formula weight | 233239.2 |
