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Comparison of decreases in the number of BrdUrd-positive cells in the epidermis of nontransgenic, E6-transgenic, p53-null, E7- and mutant E7-transgenic (E7ΔPTLHE and E7ΔDLYC) epidermis at 24 hr after irradiation. Graphed are the mean percentage of epidermal cells positively stained for BrdUrd.
