A. MDA-MB-231, breast cancer cells treated with sub-apoptotic concentrations of ARC, ABT-737 and ARC/ABT-737 combination for 24 hrs, stained with AnnexinV-PE and 7-AAD and analyzed by flow cytometry. B. SW480, colon cancer cells were treated with sub-apoptotic concentrations of ARC, ABT-737 or combination of ARC and ABT-737 stained with annexin V-PE/7-AAD and analyzed by flow cytometry. C. HepG2, liver cancer cells treated with sub-lethal concentration of ARC alone and ABT-737 alone and combination of ARC and ABT-737 as shown and analyzed after annexin V-PE/7-AAD staining by flow cytometry. The net percentages of apoptotic cells relative to untreated control are shown in parentheses.