(C,D) Quantification of cells in mitosis (C) and quantification of each step of mitosis (D) by H3Ser10P staining for Control and Beclin‐1 siRNA‐treated cells. Error bars represent standard deviations (s.d.) (n=number of counted cells) calculated on three independent experiments. Two and three asterisks indicate significant results (P=0.0028 and P=0.0006, respectively). 