Atm-, p53-, and Gadd45a-deficient mice show an increased frequency of homologous recombination at different stages during development.

Abstract excerpt

Atm, p53, and Gadd45a form part of a DNA-damage cellular response pathway; the absence of any one of these components results in increased genomic instability. We conducted an in vivo examination of the frequency of spontaneous homologous recombination in Atm-, p53-, or Gadd45a-deficient mice. In the absence of p53, we observed the greatest increase in events, a lesser increase in the absence of Atm, and only a...

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