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Changes in the site occupancy of H3K9me2 at DNA damage repair genes after gamma irradiation. Fold change was calculated by the ΔΔCt method described in the Materials and Methods section using actin8_5’UTR as a control. ‘Gene body’ is a transcription unit including both exons and introns. Error bars represent means ± SD (n = 4), and the statistical significance of the values was evaluated by Student's paired t-test (*P < 0.05).
