(S)-dihydroorotate + NAD(+) <=> orotate + NADH + H(+)
(s)-dihydroorotate + nad(+) <=> orotate + nadh + h(+)
(S)-dihydroorotate + NAD(+) <=> orotate + NADH + H(+)
(s)-dihydroorotate + nad(+) <=> orotate + nadh + h(+)