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Related to tyrosinase: tyrosine
mon·o·phe·nol mon·o·ox·y·gen·ase(mon-ō-fē'nol mon'ō-oksĭ-jen-ās'),
1. A copper-containing oxidoreductase that catalyzes the oxidation of o-diphenols to o-quinones by O2, with the incorporation of one of the two oxygen atoms in the product; it also catalyzes the oxidation of monophenols, such as l-tyrosine, to dihydroxy-l-phenylalanine (dopa), a precursor of melanin and epinephrine (catecholamines), and can act as a catechol oxidase; a deficiency of this enzyme is observed in several forms of albinism. Synonym(s): cresolase, monophenol oxidase, tyrosinase
2. Synonym(s): laccase
Farlex Partner Medical Dictionary © Farlex 2012
A copper-containing enzyme of plant and animal tissues that catalyzes the production of melanin and other pigments from tyrosine by oxidation, as in the blackening of a peeled or sliced potato exposed to air.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
tyrosinase(1) Catechol oxidase, EC 18.104.22.168.
(2) Monophenol monooxygenase, EC 22.214.171.124.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
tyrosinaseA copper-containing enzyme that occurs in melanocytes and catalyses the production of MELANIN from TYROSINE. Also known as monophenol mono-oxygenase.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
An enzyme in a pigment cell which helps change tyrosine to DOPA during the process of making melanin.
Mentioned in: Albinism
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.