G2 chromosomal radiosensitivity of ataxia-telangiectasia heterozygotes.


Five lines of skin fibroblasts from individuals heterozygous for ataxia-telangiectasia (A-T), compared with six cell lines from age-matched normal controls, show a much higher frequency of chromatid breaks and gaps following x-irradiation during the G2 phase of the cell cycle. The magnitude of this difference suggests that G2 chromatid radiosensitivity… (More)


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