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Multiple biological effects are induced by ionizing radiation through dysfunction of cellular organelles, direct interaction with nucleic acids and production of free radical species. The expression of cytochrome P450s was assessed in the livers of 60 Co γ-irradiated rats. Three gray (G) of γ-irradiation caused CYP2E1 induction with a 3.6-fold increase in the mRNA at 24 h, whereas the...