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Peptidase families with most non-peptidase homologues.
| Family | Type example | Non-peptidase homologues | Percentage of all sequences |
|---|---|---|---|
| C19 | ubiquitin-specific peptidase 14 | 5,745 | 23.4% |
| C56 | PfpI peptidase | 10,596 | 76.5% |
| M16 | pitrilysin | 7,603 | 24.5% |
| M20 | glutamate carboxypeptidase | 5,894 | 12.5% |
| M38 | isoaspartyl dipeptidase | 17,801 | 77.0% |
| S1 | chymotrypsin A | 8,158 | 11.0% |
| S8 | subtilisin | 8,860 | 23.0% |
| S9 | prolyl oligopeptidase | 6,882 | 11.2% |
| S33 | prolyl aminopeptidase | 7,253 | 21.8% |
