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Effects of melatonin and its metabolites on melanogenesis and cell growth of human SKMEL-188 melanoma (A) and normal human epidermal melanocytes (B). Melanoma cells were grown in Ham’s F10 media containing 400 µM L-tyrosine with 10−5M of test compounds. Normal human melanocytes cells were grown in MBM-4 media supplemented with MGM-4 containing10−5 M of test compounds.
