ID 1.3.1.15 DE dihydroorotate dehydrogenase (NADP(+)). CA (S)-dihydroorotate + NADP(+) = H(+) + NADPH + orotate. CC -!- Other class 1 dihydroorotate dehydrogenases use either fumarate CC (EC 1.3.98.1) or NAD(+) (EC 1.3.1.14) as electron acceptor. CC -!- The membrane bound class 2 dihydroorotate dehydrogenase (EC 1.3.5.2) CC uses quinone as electron acceptor. //