Monocyclic monoterpene ketone monooxygenase (, 1-hydroxy-2-oxolimonene 1,2-monooxygenase, dihydrocarvone 1,2-monooxygenase, MMKMO) is an enzyme with systematic name (-)-menthone,NADPH:oxygen oxidoreductase. This enzyme catalyses the several chemical reaction, for example the conversion of (âÂÂ)-menthone to mentholactone:
This enzyme is a flavoprotein of Baeyer-Villiger monooxygenase type, which uses molecular oxygen as oxidant and incorporates one of its atoms into the starting material. It can act on a variety of monoterpene ketones and cyclohexanones.