Figure 2: Expression of HPV oncoproteins and apoptotic molecules in HeLa cells treated with Oroxylum indicum extract. (a) HPV18 E6 (b) HPV18 E7 (c) caspase-3 (d) caspase-8. Detection of proteins was determined by Western blot analysis after 24 h. p -actin was used as an internal control. Graph represents the mean relative index for expression level of targeted proteins in treated and untreated HeLa cells. The signal density was normalized with p -actin. Values are expressed as mean ± SD from three independent experiments. *P < 0.05 is considered significant.