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Phenotypic complementation of A-T fibroblasts by pCAT4.5. (A) Colony survival of irradiated control cells (GM847), parental A-T cells (AT5BIVA), and A-T cells transfected with pCAT4.5 [AT5BIVA(CAT4.5/9a)]. (B) Induction of apoptosis by x-irradiation (5-Gy x-rays).
