(F) Histological analysis of intestinal epithelium of KLF4 loxp/loxp mice with AAV7-mCherry or AAV7-Cre-mCherry intraperitoneal injection followed by 8-Gy (total-body) γ-irradiation 5-weeks after then. Tissues were collected from the sham mice and mice at different time after exposure to γ-irradiation. Scale bars, 100 μm. 