Lignin degradation and detoxification of lignin-derived products (By similarity). Has activity towards guaiacol (PubMed:2394718). 4 hydroquinone + O2 = 4 benzosemiquinone + 2 H2O Binds 4 Cu cations per monomer. 2 allelic forms exist in position 111. Belongs to the multicopper oxidase family.