Fig. 7.

Representative histology of the hamster epithelium. Hematoxylin and eosin staining demonstrates an intact epithelium (first row). Nuclear Ki67 staining (brown) of the basal cells suggests cellular proliferation at each time point (middle row). An absence of staining by anti-cleaved caspase-3 suggests no apoptosis (third row). Images were acquired using a $40\times$ air objective.