Figure 5: Effect of xanthones on the mRNA expression of cytochrome C as determined by qRT-PCR for SK-MEL-28 cell line treated with xanthones for 48 h. The values are shown as the mean ± SEM ( for γ-mangostin and for α-mangostin and 8-deoxygartanin). Treatments significantly different from the untreated control at are presented as * and at as **.