Fig. 4. Caspase activity was determined on SK-MEL-28 cells after 48 h treatment with a-mangostin, c-mangostin and 8-deoxygartanine using a luminescent kit. Data were
presented as relative luminescence unit (RLU)/cell/s (⁄104). The values are shown as means ± SEM of 3 independent experiments. Treatments significantly different from the
untreated control at P < 0.05 are presented as ⁄.