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C/EBPα is dispensable for normal epidermal homeostasis. A, percentage BrdUrd-positive S-phase keratinocytes (top) and percentage apoptotic keratinocytes in the interfollicular basal epidermis (bottom). Columns, mean (n = 5 mice/group); bars, SE.B, immunoblot analysis of various markers of differentiation. C, immunostaining for various markers of squamous differentiation. Bar, 10 μm. D, immunoblot analysis of epidermal C/EBPβ and p21.
