Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords | 
| 1 | A (A)  | Cationic trypsin | polymer | 223 | 23324.3 | 1 | UniProt (P00760) Pfam (PF00089)  | Bos taurus (cattle) | Beta-trypsin | 
| 2 | B, C, N, O (A)  | GLYCEROL | non-polymer | 92.1 | 4 | Chemie (GOL) | |||
| 3 | D, F, G, H, I... (A)  | SULFATE ION | non-polymer | 96.1 | 8 | Chemie (SO4) | |||
| 4 | E (A)  | CALCIUM ION | non-polymer | 40.1 | 1 | Chemie (CA) | |||
| 5 | M (A)  | BENZAMIDINE | non-polymer | 120.2 | 1 | Chemie (BEN) | |||
| 6 | P (A)  | water | water | 18.0 | 337 | Chemie (HOH) | 
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 1 | 
| Total formula weight | 23324.3 | |
| Non-Polymers* | Number of molecules | 14 | 
| Total formula weight | 1297.1 | |
| All* | Total formula weight | 24621.4 | 






