The effect of CASP8AP2 knockout on cell cycle progression by FACS-based, propidium iodide cell cycle analysis. (a) Knockout clone. (b) Parental cells. (c) Percentages of cells in the G1, S, or G2/M in asynchronous cultures calculated using BD FACS DIVA software. Results represent the average of three analyses, and error bars represent the standard deviation (*p < .05). (d) Parental and 892–7 cells were treated with thymidine to synchronize the cell cycle. After release from the thymidine block, the cells were harvested at the indicated time points and cell cycle progression was analyzed using a cytometer