Anti-PPO Antibody

Description

Polyphenol oxidase PPO enzymes catalyse the o-hydroxylation of monophenols phenol molecules in which the benzene ring contains a single hydroxyl substituent to o-diphenols phenol molecules containing two hydroxyl substituents . They can also further catalyse the oxidation of o-diphenols to produce o-quinones. It is the rapid polymerisation of o-quinones to produce black, brown or red pigments polyphenols that is the cause of 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.