Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B, C, D (A, B, C, D) | 3C-like proteinase nsp5 | polymer | 306 | 33354.2 | 4 | UniProt (K9N7C7) Pfam (PF05409) | Middle East respiratory syndrome-related coronavirus | 3CL-PRO,3CLp,nsp5 |
| 2 | E, F, G, H (A, B, C, D) | (4S)-4-(iminomethyl)-3-(isoquinolin-4-yl)-1-[6-(trifluoromethyl)pyridin-3-yl]imidazolidin-2-one | non-polymer | 385.3 | 4 | Chemie (A1CBU) | |||
| 3 | I, J, K, L (A, B, C, D) | water | water | 18.0 | 4 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 133416.7 | |
| Non-Polymers* | Number of molecules | 4 |
| Total formula weight | 1541.4 | |
| All* | Total formula weight | 134958.1 |






