##gff-version 3 P35046 UniProtKB Signal peptide 1 17 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255 P35046 UniProtKB Propeptide 18 24 . . . ID=PRO_0000028293;Note=Activation peptide P35046 UniProtKB Chain 25 256 . . . ID=PRO_0000028294;Note=Trypsin%2C alkaline B P35046 UniProtKB Domain 25 256 . . . Note=Peptidase S1;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P35046 UniProtKB Active site 70 70 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P35046 UniProtKB Active site 115 115 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P35046 UniProtKB Active site 213 213 . . . Note=Charge relay system;Ontology_term=ECO:0000250;evidence=ECO:0000250 P35046 UniProtKB Site 207 207 . . . Note=Required for specificity;Ontology_term=ECO:0000250;evidence=ECO:0000250 P35046 UniProtKB Disulfide bond 55 71 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P35046 UniProtKB Disulfide bond 180 197 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274 P35046 UniProtKB Disulfide bond 209 233 . . . Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU00274