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We have investigated the ability of the 3′ exonuclease activity of Saccharomyces cerevisiae DNA polymerase ɛ (Pol ɛ) to proofread newly inserted ribonucleotides (rNMPs). During DNA synthesis in vitro, Pol ɛ proofreads ribonucleotides with apparent efficiencies that vary from none at some locations to more than 90% at others, with rA and rU being more efficiently proofread than rC and rG. Previous...
We report here the transcriptional responses in Saccharomyces cerevisiae to deletion of the RNH201 gene encoding the catalytic subunit of RNase H2. Deleting RNH201 alters RNA expression of 349 genes by ≥1.5-fold (q-value <0.01), of which 123 are upregulated and 226 are downregulated. Differentially expressed genes (DEGs) include those involved in stress responses and genome maintenance, consistent...
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