monophenol monooxygenase activity monophenol dihydroxyphenylalanine:oxygen oxidoreductase activity o-diphenol:oxygen oxidoreductase tyrosinase activity o-diphenol oxidase activity o-diphenol oxidoreductase cresolase activity monophenol oxygenase polyaromatic oxidase activity Catalysis of the reaction: L-tyrosine + L-DOPA + O2 = L-DOPA + DOPAquinone + H2O. monophenolase activity EC:1.14.18.1 MetaCyc:MONOPHENOL-MONOOXYGENASE-RXN polyphenolase activity phenol oxidase activity phenolase activity monophenol, dihydroxy-L-phenylalanine oxygen oxidoreductase activity tyrosine-dopa oxidase activity In mammals, L-DOPA can act as a cofactor for the catalyzed reaction; therefore in some resources L-DOPA is shown on both sides of the reaction. GO:0004503 describes the monooxygenation of the monophenol, L-tyrosine. For oxidation of diphenols (including L-DOPA and dopamine), consider instead the term 'catechol oxidase activity ; GO:0004097' and its children. monophenol,L-dopa:oxygen oxidoreductase activity pyrocatechol oxidase N-acetyl-6-hydroxytryptophan oxidase activity prophenol oxidase activity chlorogenic acid oxidase activity GO:0004503 monophenol monooxidase activity catecholase molecular_function o-diphenol:O2 oxidoreductase activity prophenoloxidase activity dopa oxidase monophenol oxidase activity RHEA:18120 chlorogenic oxidase activity L-tyrosine monooxygenase activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, another compound as one donor, and incorporation of one atom of oxygen