##gff-version 3 Q56037 UniProtKB Chain 1 216 . . . ID=PRO_0000063166;Note=Purine nucleoside phosphorylase DeoD-type Q56037 UniProtKB Active site 184 184 . . . Note=Proton donor;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01627 Q56037 UniProtKB Binding site 4 4 . . . Note=In other chain;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P50389 Q56037 UniProtKB Binding site 23 23 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P50389 Q56037 UniProtKB Binding site 67 70 . . . Note=In other chain;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P50389 Q56037 UniProtKB Binding site 159 161 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P50389 Q56037 UniProtKB Binding site 183 184 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:P50389 Q56037 UniProtKB Site 198 198 . . . Note=Important for catalytic activity;Ontology_term=ECO:0000255;evidence=ECO:0000255|HAMAP-Rule:MF_01627 Q56037 UniProtKB Non-terminal residue 1 1 . . . .