Tyrosianase can catalyze ortho-hydroxylation of phenols to catechols (monophenolase activity) and the subsequent oxidation of catechols to the corresponding o-quinones (catecholase activity) with high efficiency and selectivity under mild conditions.

In this paper,we find that Morin has potent inhibitory effects on the monophenolase and o-diphenolase activity of mushroom tyrosinase.

Study on the changes of browning degree and polyphenol oxidase activity of potato during storage

The chlorogenic acid content and the polyphenol oxidase activity o.

The flour whiteness, the flour yellowness, protein content, ash content, the Granular size, extraction rate, Pasta's whiteness and yellowness in 0 h, 12h, 24h, 36h, 48h, 60h, PPO enzyme activity were investigated, the PPO activity in different PH, substrate concentrations and enzyme concentrations were a.

Variation of phenoloxidase activity affected by hemocyanin in shrimp Penaeus vannamei;

Infectivity of a Pieris brassicae-derived Zoophthora radicans isolate and its new host-passage isolates against Plutella xylostella in relation to the phenoloxidase activity in the new host hemolymph after infection;

However,to date no research about white leg shrimp Litopenaeus vannamei hemocyanin showing phenoloxidase activity was reported.