sp|B2AHE3|PUR7_CUPTR Phosphoribosylaminoimidazole-succinocarboxamide synthase OS=Cupriavidus taiwanensis (strain DSM 17343 / BCRC 17206 / CCUG 44338 / CIP 107171 / LMG 19424 / R1) OX=977880 GN=purC PE=3 SV=1