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Histological appearance of skin from K5 E2F1 transgenic mice with or without p53. Hematoxylin/eosin stain of skin sections from nontransgenic sibling with wild-type p53 (A), nontransgenic sibling null for p53 (B), line 1.0 transgenic with wild-type p53 (C), and line 1.0 transgenic null for p53 (D).
