Evidence that DNA polymerase δ proofreads errors made by DNA polymerase α across the Saccharomyces cerevisiae nuclear genome.

Abstract excerpt

We show that the rates of single base substitutions, additions, and deletions across the nuclear genome are strongly increased in a strain harboring a mutator variant of DNA polymerase α combined with a mutation that inactivates the 3´-5´ exonuclease activity of DNA polymerase δ. Moreover, tetrad dissections attempting to produce a haploid triple mutant lacking Msh6, which is essential for DNA mismatch repair...

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