Fig. 7. Effects on stem cells in vivo. (A) Label-retaining analyses; percent of BrdU-positive cells with respect to total number of nuclei 2 months after the last injection. all, all skin; Ct, control, F, hair follicles; IF, interfollicular epidermis. S.e.m. is shown. (B) Skin sections stained for ß1 integrin (white) or p63 (green); nuclei stained with DAPI (DNA, blue). Arrows indicate p63 positive cells. Bars are s.e.m. Bar, 20 µm.