DNA repair within the cell nucleus is a dynamic process involving a close interaction between repair proteins and chromatin structure. Recent studies have indicated a quantitative relationship between DNA double-strand break induction and histone H2AX phosphorylation. The dynamics of this process within individual cell nuclei is unknown. To address this, we have used a novel focused ultrasoft X-ray microprobe that is capable of inducing localized DNA damage within a subnuclear area of intact ...Expand abstract
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Histone H2AX phosphorylation in normal human cells irradiated with focused ultrasoft X rays: evidence for chromatin movement during repair.
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