Dihydroorotate dehydrogenase (quinone)
Dihydroorotate dehydrogenase (quinone) (, dihydroorotate:ubiquinone oxidoreductase, (S)-dihydroorotate:(acceptor) oxidoreductase, (S)-dihydroorotate:acceptor oxidoreductase, DHOdehase (ambiguous), DHOD (ambiguous), DHODase (ambiguous), DHODH) is an enzyme with systematic name (S)-dihydroorotate:quinone oxidoreductase. This enzyme catalyses the following chemical reaction

 (S)-dihydroorotate + a quinone  orotate + a quinol

This Class 2 dihydroorotate dehydrogenase enzyme contains FMN.