| C01.001: papain 1PE6 |
 |
| C01.032: cathepsin L 1CJL |
 |
| C01.032: cathepsin L 1CS8_P |
 |
| C01.075: cruzipain 2AIM |
 |
| C01.085: bleomycin hydrolase (yeast) 1GCB |
 |
| C02.002: calpain-2 1DF0_A |
 |
| C06.001: potato virus Y-type helper component peptidase 3RNV |
 |
| C10.001: streptopain 1DKI_A |
 |
| C12.002: ubiquitinyl hydrolase-YUH1 1CMX |
 |
| C16.009: severe acute respiratory syndrome coronavirus papain-like peptidase 2FE8 |
 |
| C19.016: ubiquitin-specific peptidase 7 1NBF |
 |
| C28.001: foot-and-mouth disease virus L-peptidase 1QMY_A |
 |
| C31.UPW: family C31 unassigned peptidases 3IFU |
 |
| C32.001: equine arteritis virus-type cysteine peptidase 3MTV |
 |
| C39.001: bacteriocin-processing peptidase 3K8U |
 |
| C47.001: staphopain A 1CV8 |
 |
| C54.003: autophagin-1 2CY7 |
 |
| C58.002: AvrPphB peptidase 1UKF_A |
 |
| C66.001: IdeS peptidase 1Y08 |
 |
| C78.001: UfSP1 peptidase 2Z84 |
 |
| C85.001: OTUD5 peptidase (Homo sapiens) 3TMP |
 |
| C87.001: nairovirus deubiquitinylating peptidase 3PT2_A |
 |
| C93.UPW: family C93 unassigned peptidases 4FGO |
 |
