Table 3.
Families with homologues only from viruses with a ssRNA genome.
| Family | Type example |
|---|---|
| C16 | murine hepatitis coronavirus papain-like peptidase 1 |
| C23 | carlavirus peptidase |
| C24 | rabbit hemorrhagic disease virus 3C-like peptidase |
| C27 | rubella virus peptidase |
| C28 | foot-and-mouth disease virus l-peptidase |
| C30 | porcine transmissible gastroenteritis virus-type main peptidase |
| C31 | porcine reproductive and respiratory syndrome arterivirus-type cysteine peptidase alpha |
| C32 | equine arteritis virus-type cysteine peptidase |
| C33 | equine arteritis virus Nsp2-type cysteine peptidase |
| C36 | beet necrotic yellow vein furovirus-type papain-like peptidase |
| C37 | calicivirin |
| C42 | beet yellows virus-type papain-like peptidase |
| C49 | strawberry mottle virus peptidase |
| C62 | gill-associated virus 3C-like peptidase |
| C74 | pestivirus NS2 peptidase |
| C99 | iflavirus processing peptidase |
| C105 | papain-like peptidase 1 alpha |
| C107 | alphamesonivirus 3C-like peptidase |
| N1 | nodavirus peptide lyase |
| N2 | tetravirus coat protein |
| S3 | togavirin |
| S29 | hepacivirin |
| S30 | potyvirus P1 peptidase |
| S31 | pestivirus NS3 polyprotein peptidase |
| S32 | equine arteritis virus serine peptidase |
| S39 | sobemovirus peptidase |
| S65 | picornain-like serine peptidase |
| S75 | white bream virus serine peptidase |