One of a group of enzymes (EC subclass 1.13) catalyzing direct incorporation of O2 into substrates; e.g., tryptophan 2,3-dioxygenase (tryptophan pyrrolase) catalyzing reaction between O2 and l-tryptophan to form N-l-formylkynurenine. Cf.:dioxygenase, monooxygenases.
- mixed function o. any monooxygenase that catalyzes AH + O2 + DH2 → AOH + H2O + D.
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ox·y·gen·ase 'äk-si-jə-.nās, -.nāz n an enzyme that catalyzes the reaction of an organic compound with molecular oxygen
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ox·y·gen·ase (okґsĭ-jən-ās) [EC 1.13] any member of a subclass of enzymes of the oxidoreductase class that catalyze the oxidation of a single substrate (hydrogen donor) with incorporation of one or both atoms of oxygen from molecular oxygen into the substance oxidized.Medical dictionary. 2011.