Fig. 1

Bullatacin induces apoptosis in colon cancer cells. A CCK-8 assay of the cell viability of SW480 cells treated with bullatacin for 24 h. Significance: **P < 0.01 versus control. B CCK-8 assay of the cell viability of HT-29 cells treated with bullatacin for 24 h. Significance: **P < 0.01 versus control. C Flow cytometric analysis of the time-dependent apoptosis of SW480 cells treated with bullatacin (10 nM). D Flow cytometric analysis of the time-dependent apoptosis of HT-29 cells treated with bullatacin (10 nM)