Fig. 3.
Cell cycle kinetics after irradiation. IL-3–dependent bone marrow cells from wild-type (A) or p53-null (B) mice were plated at 2 × 105 cell/mL in a 24-well plate in the presence or absence of IL-3 after X-irradiation with 4 Gy as indicated. Cell cycle analysis was performed by labeling the cells with PI and analyzing DNA content using Lysis II software (Becton Dickinson, San Jose, CA) on the FACScan.