NAD(P)H Dehydrogenase (Quinone). Diaphorase, DT . Reductase, Menadione . Reductase, Phylloquinone . Reductase, Quinone . Reductase, Vitamin K . DT Diaphorase . Menadione Reductase . Phylloquinone Reductase . Quinone Reductase . Vitamin K Reductase . UBIQUINONE REDUCTASE . A flavoprotein that reversibly catalyzes the oxidation of NADH or NADPH by various quinones and oxidation-reduction dyes. The enzyme is inhibited by dicoumarol, capsaicin, and caffeine. . 0.69