Fig. 6. Proliferation in hair follicles and sebaceous function. (A) Hair follicle sections from control (Ct) or KO skin stained in red for keratin 5 (K5) or keratin 6 (K6) as indicated; nuclei were stained with DAPI (blue). Arrows indicate areas of loss of expression. (B,C) Oil red O staining on sections from back (B) or tail (C) skin to detect sebaceous secretion. Arrowheads point at sebaceous glands. Every study was carried out with mice of the same litter. Bar, 20 µm.