Fig. 2.

Effects of PS and VS on melanogenesis in Mel-Ab cells. Mel-Ab cells were treated with PS or VS at 1~20 µg/ml for 4 days. (A) Phase contrast photographs were taken using a digital video camera. Melanin content (B and C) and tyrosinase activity (D and E) were measured as described in Methods. Data are expressed as the mean±S.D. of triplicate assays. ^**p<0.01 compared to the untreated control.