Incorporation of carboxyl groups into melanin by skin tyrosinase.
D000818:Animals; D002247:Carbon Isotopes; D004295:Dihydroxyphenylalanine / Q000378:metabolism*; D005399:Fishes; D008543:Melanins / Q000096:biosynthesis*; D010088:Oxidoreductases / Q000378:metabolism*; D012867:Skin / Q000201:enzymology*; D014443:Tyrosine / Q000378:metabolism*
D002247:Carbon Isotopes; D008543:Melanins; D014443:Tyrosine; D004295:Dihydroxyphenylalanine; D010088:Oxidoreductases