Dictionary > Polyphenol oxidase

Polyphenol oxidase

Definition
noun
A copper-containing enzyme that catalyzes the o-hydroxylation of monophenols to o-diphenols, as well as the oxidation of o-diphenols to o-quinones.
Supplement
This enzyme is found commonly in fruits. It is responsible for the fruits to turn brown. The rapid polymerization of o-quinones results in the formation of black, brown, or red pigments (polyphenols), which cause fruit browning.
Tyrosine may also be oxidized by the action of polyphenol oxidase to form o-quinone. Hence, polyphenol oxidase may also be referred to as tyrosinase.
Word origin: Greek, polýs, many + phenol.
Abbreviation: POP
Synonyms:

See also: phenol oxidase.


You will also like...

3D rendering of an antibody
Passive and Active Types of Immunity

Lymphocytes are a type of white blood cell capable of producing a specific immune response to unique antigens. In thi..

Pink Lotus plant on a pond
Freshwater Lentic Communities & Animals

This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

Mātauranga Māori and Science Collaboration
Mātauranga Māori and Science

Mātauranga Māori is the living knowledge system of the indigenous people of New Zealand, including the relationships t..

Body temperature regulation by the hypothalamus
Temperature Regulation in Animals

This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..

The process of photosynthesis
Photosynthesis – Photolysis and Carbon Fixation

Photosynthesis is the process that plants undertake to create organic materials from carbon dioxide and water, with the ..

Chromosome Mutations
Chromosome Mutations

Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..