##gff-version 3 B2I5X7 UniProtKB Chain 1 269 . . . ID=PRO_1000190573;Note=1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase B2I5X7 UniProtKB Active site 10 10 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014 B2I5X7 UniProtKB Active site 132 132 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014