The Oxidation of p-Octylphenol by Mushroom Tyrosinase.

Oxidation of Rosmarinic Acid Catalyzed by Mushroom Tyrosinase

Rosmarinic acid isolated from the Perilla frutescens (L.) was found to possess mushroom tyrosinase (EC 1.14.18.1) inhibitory activities with an IC50 of 4.0 μM. However, rosmarinic acid was oxidized as a substrate catalyzed by tyrosinase. The oxidation kinetics of mushroom tyrosinase by rosmarinic acid measured by spectrophotometic and polarographic methods showed Km=166.8 μM, 225.1 μM and Vmax=...

The inhibition effects of melon on mushroom tyrosinase activity

The  inhibition effects seed and peel of melon on diphenolase activity of mashroom tyrosinase were investigated. The IC50 values and Ki values of seed and peel of melon were evaluated. increased the Km value and decreased the Vm value so it show mixed type inhibition on mushroom tyrosinase when L-DOPA was used as a substrate.

Purification of Tyrosinase from Edible Mushroom

The oxidation of phenylhydrazine by tyrosinase.

Tyrosinase was found to catalyze the oxidation of phenylhydrazine to phenol in a reaction that did not resemble those typically performed by tyrosinase. The kinetics of this reaction was investigated by measuring the initial velocity of the formation of phenol (25 °C). The values of k cat and K M for the oxidation of phenylhydrazine were obtained as 11.0 s(-1) and 0.30 mM, respectively. The gen...

The oxidation of catechol by tyrosinase.