5azaD/SAHA treatment induces the apoptosis of PMF CD34⁺ cells. (A) A representative flow cytometric pattern demonstrating the analysis of the percentage of PMF CD34⁺ cells which are annexin V⁺PI⁻ after the culture of PMF CD34⁺ cells in the presence of cytokines alone or cytokines plus 5azaD/SAHA. (B) The percentage of CD34⁺annexin V⁺PI⁻ cells were greater in PMF CD34⁺ cells treated with cytokines plus 5azaD/SAHA compared with that observed in PMF CD34⁺ cells treated with cytokines alone (n = 6). *P < .05.