Figure 2.

Apoptosis percentage for sorted cells. (A) Apoptosis percentage for sorted cells prior to radiation: CD44⁺CD24⁺ (3.3±0.6%); CD44⁺CD24⁻ (4.0±0.8%); CD44⁻CD24⁺ (3.4±0.7%); and CD44⁻CD24⁻ (3.5±0.8%). (B) Apoptosis percentage for sorted cells following 48 h of radiation: CD44⁺CD24⁺ (6.8±1.1%); CD44⁺CD24⁻ (10.4±2.7%); CD44⁻CD24⁺ (13±3.1%); and CD44⁻CD24⁻ (26.3±2.4%). Each analysis was performed four times. CD, cluster of differentiation; FITC, fluorescein isothiocyanate; PI, propidium iodide.