##gff-version 3 A5UGY5 UniProtKB Chain 1 249 . . . ID=PRO_1000063211;Note=1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase A5UGY5 UniProtKB Active site 11 11 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014 A5UGY5 UniProtKB Active site 133 133 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014