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为阐明毛细血管扩张性共济失调突变基因(Ataxia telangiectasia mutated,ATM)介导的乳癌基因1(Breast cancer gene 1,Brcal)磷酸化及其下游DNA修复相关蛋白(DNA damage repair protein 51,RAD51)在DNA损伤修复信号传导通路中作用机理,以源于正常人皮肤的成纤维细胞系GM细胞(Originated from human skin fibroblast GM Cell,GM0639)为对照,用免疫共沉淀与Western bl