##gff-version 3 P54627 UniProtKB Signal peptide 1 22 . . . Ontology_term=ECO:0000305;evidence=ECO:0000305 P54627 UniProtKB Propeptide 23 30 . . . ID=PRO_0000028271;Note=Activation peptide P54627 UniProtKB Chain 31 256 . . . ID=PRO_0000028272;Note=Trypsin epsilon P54627 UniProtKB Domain 31 254 . . . Note=Peptidase S1;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P54627 UniProtKB Active site 71 71 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P54627 UniProtKB Active site 116 116 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P54627 UniProtKB Active site 210 210 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P54627 UniProtKB Site 204 204 . . . Note=Required for specificity;Ontology_term=ECO:0000250;evidence=ECO:0000250 P54627 UniProtKB Disulfide bond 56 72 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P54627 UniProtKB Disulfide bond 180 197 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P54627 UniProtKB Disulfide bond 206 230 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274