##gff-version 3 P37323 UniProtKB Chain 1 265 . . . ID=PRO_0000195440;Note=Beta-lactamase SHV-4 P37323 UniProtKB Active site 45 45 . . . Note=Acyl-ester intermediate;Ontology_term=ECO:0000255;evidence=ECO:0000255|PROSITE-ProRule:PRU10101 P37323 UniProtKB Active site 143 143 . . . Note=Proton acceptor;Ontology_term=ECO:0000250;evidence=ECO:0000250 P37323 UniProtKB Binding site 209 211 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250 P37323 UniProtKB Disulfide bond 52 98 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250