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Expression of biomarkers related to proliferation and apoptosis in tumors induced in hairless and haired Ptch+/− littermates. A: IHC staining of cyclin D1, immunofluorescence staining of PCNA, and TUNEL staining. B: Nuclear cyclin D1 and PCNA staining, as quantified in BCCs excised from hairless and haired mice. Data are represented as means ± SEM of at least three samples. AU, arbitrary unit.
