Demonstration of 5,6-dihydroxyindole-2-carboxylic acid, a melanin precursor, in normal urine.
D002850:Chromatography, Gel; D006801:Humans; D007211:Indoles / Q000652:urine*; D008544:Melanocytes / Q000378:metabolism
D007211:Indoles; C030692:5,6-dihydroxy-2-indolylcarboxylic acid