##gff-version 3 A1W434 UniProtKB Chain 1 247 . . . ID=PRO_0000290442;Note=1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase A1W434 UniProtKB Active site 8 8 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014 A1W434 UniProtKB Active site 131 131 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014