Fig. 7.

Effect of H₂O₂ concentration on percent of cells in S-phase. Increasing concentrations of H₂O₂ decreases the percent of cells in S-phase for all hCB-ECs. The slope is steeper for hCB-ECs with fewer than 31 population doublings than for hCB-ECs that underwent more than 44 population doublings. Low passage hCB-ECs have a higher percent of cells in S-phase than aged hCB-ECs. For each experiment, 2 replicates were performed (n=5)