| C03.005: hepatitis A virus-type picornain 3C 1HAV_A |
 |
| C03.021: rhinovirus picornain 2A 2HRV_A |
 |
| C04.004: tobacco etch virus NIa peptidase 1LVM |
 |
| C30.004: porcine transmissible gastroenteritis virus-type main peptidase 1LVO_A |
 |
| C37.001: calicivirin 1WQS_A |
 |
| S01.001: chymotrypsin A (cattle-type) 2GMT |
 |
| S01.151: trypsin 1 1JRS |
 |
| S01.270: exfoliatin A 1EXF |
 |
| S01.278: HtrA2 peptidase 1LCY_A |
 |
| S03.001: togavirin 2SNV |
 |
| S06.003: Tsh peptidase 1WXR |
 |
| S29.001: hepacivirin 1A1R |
 |
| S32.001: equine arteritis virus serine peptidase 1MBM_A |
 |
