##gff-version 3 Q2A5V4 UniProtKB Chain 1 269 . . . ID=PRO_1000018204;Note=Tryptophan synthase alpha chain Q2A5V4 UniProtKB Active site 50 50 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_00131 Q2A5V4 UniProtKB Active site 61 61 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_00131