%0 Journal Article %T Detecting Positive and Purifying Selection at Synonymous Sites in Yeast and Worm %A Zhou, Tong %A Gu, Wanjun %A Wilke, Claus O. %J Molecular Biology and Evolution %V 27 %N 8 %P 1912-1922 %@ 0737-4038 %D 2010-03-15 %I Oxford University Press %~ DeepDyve