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MnSOD+/+ and MnSODtet/tet cells demonstrate G2/M-phase arrest after irradiation. MnSOD+/+ (panel A) and MnSODtet/tet (panel B) cells grown in the presence or absence of doxy for 24 h were irradiated to 5 or 10 Gy. Cells were harvested 24 h later and cell cycle analysis was performed. A G2/M-phase arrest was detected in both cells grown in the presence or absence of doxy.
