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Effects of THC on mRNA expression of genes for TYR (A), TRP-1 (B), and TRP-2 (C) in B16F10 melanoma cells. Levels of mRNA were determined by PCR and GAPDH was used as the internal reference. Results are expressed as mean SD (n = 3). *** p < 0.001 compared to group treated with α-MSH.
