##gff-version 3 Q18DL2 UniProtKB Chain 1 245 . . . ID=PRO_0000290572;Note=1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase Q18DL2 UniProtKB Active site 15 15 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014 Q18DL2 UniProtKB Active site 135 135 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014