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The effect of Nrf2 knockout on the apoptosis of the small intestines after exposure to abdominal irradiation. The small intestines of Nrf2+/+ mice and Nrf2−/− mice were harvested at 6 h post-abdominal irradiation for TUNEL assay. (A) Representative TUNEL staining images of the small intestines. Scale bar, 50 μm; (B) TUNEL-positive cells in a single field of view were quantified. The data were shown as mean ± SD. *** p < 0.001, Nrf2−/− group versus Nrf2+/+ group.
