A, control and shSUZ12 expressing SKOV3 cells were examined for cell cycle distribution by FACS. The percentage of sub-G1 cells was indicated. B, quantitation of A. Mean of three independent experiments with SD. * p<0.001 compared with controls. C, control and indicated shSUZ12-expressing SKOV3 cells were stained for Annexin V, a cell surface marker of apoptosis. Annexin V-positive cells were measured by Guava Nexin assay. The percentage of Annexin V positive cells was indicated. D, quantitation of C. Mean of three independent experiments with SD. * p<0.001 compared with controls. E, same as A and C, but examined for expression of cleaved lamin A, caspase 3 and PARP p85, in control and indicated shEZH2-expressing cells.