 For example, laccases play a role in the formation of lignin by promoting the oxidative coupling of monolignols, a family of naturally occurring phenols.Other laccases, such as those produced by the fungus "Pleurotus ostreatus", play a role in the degradation of lignin, and can therefore be classed as lignin-modifying enzymes.Other Laccases produced by fungi can facilitate the biosynthesis of melanin pigments.