Detection of CD34+CD38- subpopulation in KG-1a cells. It shows the flow cytometric analysis of CD34 and CD38 expression. FITC denotes fluorescein isothiocyanate, and PE phycoerythrin. a, KG-1a cells incubated at 50 μg/mL of 5-FU for 4 d. The enriched cells had a high percentage of CD34-CD38- subpopulation. b, KG-1a cells.