polyphenoloxidase


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polyphenoloxidase

(pŏl″ē-fē″nŏl-ŏk′sĭ-dās)
An enzyme present in bacteria, fungi, and some plants that catalyzes the oxidation of polyphenols, but not monophenols such as tyrosine, to quinones.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Nkang A, Omokaro D, Egbe A (2000) Effects of desiccation on the lipid peroxidation and activities of peroxidase and polyphenoloxidase in seeds of Telfairia occidentalis.
It is due to the production of brown-colored polymers (melanoidins) from enzyme catalyzed reactions, such as peroxidase and polyphenoloxidase (TOMASBARBERAN; SPIN, 2001; VILAS-BOAS, 2002).
Polyphenoloxidase Silencing Affects Latex Coagulation in Taraxacum Species.
Isolation, purification and physicochemical characterization of polyphenoloxidase (PPO) from a dwarf variety of banana (Musa cavendishii, L).
The first one involves the enzymatic browning reaction; the enzymes responsible for browning, especially peroxidase and polyphenoloxidase, in contact with oxygen, cause the oxidation of phenolic compounds.
monophenol monooxygenase, polyphenoloxidase, catechol oxidase, and oxidoreductase), a copper-containing enzyme that induces formation of catecholamine quinone derivatives by its oxidase activity, makes a point since it has been demonstrated to cause a neuronal toxicity through oxidation of cytosolic excess dopamine in PD [9].
Dri, "Polyphenoloxidase inactivation by light exposure in model systems and apple derivatives," Innovative Food Science & Emerging Technologies, vol.