##gff-version 3 O35074 UniProtKB Chain 1 501 . . . ID=PRO_0000051911;Note=Prostacyclin synthase O35074 UniProtKB Transmembrane 1 21 . . . Note=Helical;Ontology_term=ECO:0000255;evidence=ECO:0000255 O35074 UniProtKB Binding site 107 107 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:F1RE08 O35074 UniProtKB Binding site 113 113 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:F1RE08 O35074 UniProtKB Binding site 288 288 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:F1RE08 O35074 UniProtKB Binding site 359 360 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:F1RE08 O35074 UniProtKB Binding site 383 383 . . . Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:F1RE08 O35074 UniProtKB Binding site 442 442 . . . Note=Axial binding residue;Ontology_term=ECO:0000250;evidence=ECO:0000250|UniProtKB:Q16647