Radiation-sensitive irs mutants rejoin DNA double-strand breaks with efficiency similar to that of parental V79 cells but show altered response to radiation-induced G2 delay.

Abstract excerpt

Induction and repair of DNA double-strand breaks (dsb) was investigated in plateau phase Chinese hamster V79 cells and three radiosensitive mutant cell lines derived from them, irs-1, irs-2 and irs-3, using a pulsed-field gel electrophoresis assay, Asymmetric Field Inversion Gel Electrophoresis (AFIGE). There was no difference in the induction of DNA dsb per Gy and dalton between the radiosensitive mutant cells...

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