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UVB irradiation induces expression of p53 and p21 in NES-G2T and NES-B3T cells. After irradiation, both cell lines show increased p53 expression by 6 h and increased p21 expression by 24 h; β-tubulin served as a loading control. MCF-7 cells treated with 0.2 μg/ml of doxorubicin served as a positive control for p53 and p21 expression.
