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Inhibitory effect of the active fraction ACMF09 and 4,5-diCQA on tyrosinase activity. The inhibition of cell-free tyrosinase activity was determined using mushroom tyrosinase. Azelaic acid (AZ) was used as a positive control. The results are expressed as percentages of the control, and the data are mean ± SEM of three independent experiments. ∗ P < 0.05 as compared to the untreated control.
