Depletion of FES disturbs cell cycle. P815 cells transfected with either control or fes siRNAs were labeled with CFSE. Histogram plots represent the profiles for the 2 populations, fes I siRNA (gray line) and control siRNA (black line) on day 0 (A) and 2 days following labeling (B,C). (C) The estimated number of cell divisions is indicated above the histogram. The analyses were done with FlowJo software. These profiles represent 1 of 3 independent experiments that gave similar results.