Summary: 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/Laccase-From-Escherichia-Coli-Recombinant_3771.html