Effects of UBA2 on the cell cycle and apoptosis. (A and B) Cell cycle analysis by flow cytometry in RKO cells transfected with (A) NC-siRNA and (B) UBA2-siRNA. (C) Relative quantity of cells in G0/G1, S and G2/M phases in the RKO cells transfected with UBA2-siRNA or NC-siRNA. (D and E) Cell cycle analysis by flow cytometry in HCT116 cells transfected with (D) NC-siRNA and (E) UBA2-siRNA. (F) Relative quantity of cells in G1/G1, S and G2/M phases in the HCT116 cells transfected with UBA2-siRNA or NC-siRNA. (G-J) Apoptosis analysis by flow cytometry in (G) RKO cells transfected with NC-siRNA, (H) RKO cells transfected with UBA2-siRNA, (I) HCT116 cells transfected with NC-siRNA, and (J) HCT116 cells transfected with UBA2-siRNA. (K and L) Apoptotic rates calculated from data in RKO cells and HCT116 cells. *P<0.05, **P<0.01 vs. the NC-siRNA. All experiments were performed three times in triplicate.