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Polyphenol Oxidase

Official Full Name
Polyphenol Oxidase
Background
Polyphenol oxidase is a tetramer that contains four atoms of copper per molecule, and binding sites for two aromatic compounds and oxygen. The enzyme catalyses the o-hydroxylation of monophenol molecules in which the benzene ring contains a single hydroxyl substituent) to o-diphenols (phenol molecules containing two hydroxyl substituents). It can also further catalyse the oxidation of o-diphenols to produce o-quinones. PPO causes the rapid polymerization of o-quinones to produce black, brown or red pigments (polyphenols) that cause fruit browning. The amino acid tyrosine contains a single phenolic ring that may be oxidised by the action of PPOs to form o-quinone. Hence, PPOs may also be referred to as tyrosinases.
Synonyms
EC 1.14.18.1; Polyphenol oxidase; monophenol monooxygenase; Polyphenol oxidase I; chloroplastic

Catalog
ProductName
EC No.
CAS No.
Source
Price
CatalogNATE-0612
EC No.EC 1.14.18.1
CAS No.9002-10-2
SourceMushrooms
Related Services
Related Protocols
TYROSINASE Catechol Oxidase Activity -Enzymatic Assay Protocol

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