Evidence from mutational specificity studies that yeast DNA polymerases delta and epsilon replicate different DNA strands at an intracellular replication fork.

Abstract excerpt

Although polymerases delta and epsilon are required for DNA replication in eukaryotic cells, whether each polymerase functions on a separate template strand remains an open question. To begin examining the relative intracellular roles of the two polymerases, we used a plasmid-borne yeast tRNA gene and yeast strains that are mutators due to the elimination of proofreading by DNA polymerases delta or epsilon....

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