tyrosine metabolic pathway melanin biosynthetic pathway 2025-04-25T13:00:54Z Melanin biosynthesis PW:0002721 The metabolic reactions and pathways resulting in the formation of melanins, pigments largely of animal origin. High molecular weight polymers of indole quinone, they are irregular polymeric structures and are divided into three groups: allomelanins in plants and fungi, and eumelanins and pheomelanins in animals. gthayman melanin biosynthetic process pathway