Abstract
Pulsed-field gel electrophoresis (PFGE) is a sensitive assay for DNA double-strand breaks (DSBs). The application of PFGE to the measurement of DSB rejoining requires attention to conditions after irradiation. When cells are irradiated and incubated while encapsulated in agarose, DNA DSB rejoining appears incomplete or absent due to DNA degradation artifacts. Using PFGE we have measured the DSB rejoining defect in xrs-6 cells and shown how DNA degradation can affect the results.
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