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Over-expression of Gadd45a in Tca8113 cells was induced by IR. (A) The level of Gadd45a mRNA after 24-h exposure to IR at 4 or 10 Gy was significantly higher than the basal level (P<0.01). (B) Over-expression of Gadd45a protein was not significantly induced in Tca8113 cells after exposure to 4 Gy IR (P=0.0513), but was markedly induced after exposure to 10 Gy IR (P=0.0028). n=3. Mean±SD.
