##gff-version 3 A9L4B9 UniProtKB Chain 1 245 . . . ID=PRO_1000084112;Note=1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino] imidazole-4-carboxamide isomerase A9L4B9 UniProtKB Active site 7 7 . . . Note=Proton acceptor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014 A9L4B9 UniProtKB Active site 129 129 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01014