Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B (A, B) | 3C-like proteinase nsp5 | polymer | 306 | 33825.5 | 2 | UniProt (P0DTD1) Pfam (PF05409) | Severe acute respiratory syndrome coronavirus 2 | 3CL-PRO,3CLp,Main protease,Mpro,Non-structural protein 5,nsp5,SARS coronavirus main proteinase |
| 2 | C, F (A, B) | N-[(3S,4S)-4-(3-chloro-5-fluorophenyl)-1-(1,6-naphthyridine-8-carbonyl)piperidin-3-yl]-N~2~-(trifluoroacetyl)-D-valinamide | non-polymer | 580.0 | 2 | Chemie (A1B3B) | |||
| 3 | D (A) | 2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL | non-polymer | 209.2 | 1 | Chemie (BTB) | |||
| 4 | E (A) | 1,2-ETHANEDIOL | non-polymer | 62.1 | 1 | Chemie (EDO) | |||
| 5 | G, H (A, B) | water | water | 18.0 | 231 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 2 |
| Total formula weight | 67651.1 | |
| Non-Polymers* | Number of molecules | 4 |
| Total formula weight | 1431.3 | |
| All* | Total formula weight | 69082.3 |






