Laccase is a blue copper oxidase that reduces molecular oxygen to water. Laccase oxidizes polyphenols, methoxy-substituted phenols and diamines, but not tyrosine. Oxidation by laccase is an
one-electron reaction that generates a free radical. https://www.creative-enzymes.com/product/Native-Pleurotus-Ostreatus-mushroom-Laccase_1271.html