Vitamin K Reductase Definition

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Vitamin K 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. EC 1.6.99.2.

Synonym: menadione reductase, dt diaphorase, quinone reductase, phylloquinone reductase, nad(p)h dehydrogenase (quinone).