Fig. 4

Effects on the colony formation. (A) Colony-forming abilities of HepG2 cells after treating cells with the indicated concentrations of 15a, 15d, and SAHA for 14 days. (B) The statistical result of (A). The data are expressed as means ± SD of three separate experiments. *p < 0.05, **p < 0.01, ***p < 0.001 versus control.