Further Evidence for Strong Nonneutrality of Yeast Synonymous Mutations.

Abstract excerpt

Although synonymous mutations are commonly assumed neutral or nearly so, recent years have seen reports of fitness effects of synonymous mutations detected under laboratory conditions. In a previous study, we used genome editing to construct thousands of yeast mutants each carrying a synonymous or nonsynonymous mutation in one of 21 genes, and discovered that most synonymous and most nonsynonymous mutations are...

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