Figure 4f: Cell cycle distribution was analyzed by flow cytometry after staining with propidium iodide. Data from the numerical analysis in which cells were classified by cell cycle status are expressed as percentages. Means followed by the same letter indicate no significant difference by Tukey’s test (p<0.05). Uppercase and lowercase letters represent the analysis of G1 and S phase, respectively. The results are expressed as the percentage of events from a total of 20000 events (n=3).