Figures 3A-3D: shows the immunohistochemical detection of DTdiaphorase in normal skin: Figure 3A: weak DT-diaphorase expression in normal epidermis (E). No DT-diaphorase expression is seen in dermis (D). (C=stratum corneum). Figure 3B: cell-to-cell variability of DT-diaphorase expression in normal skin. (E=epidermis). Figures 3C-D: very strong expression of DTdiaphorase in sebaceous glands (G). (Figure D=negatif control).