Figure 1From: Selection in the evolution of gene duplicationsSynonymous and nonsynonymous substitution rates for (a,b) paralogs and (c,d) orthologs from (a,c) bacteria and (b,d) mammals. All points with Ks > 0.5 (approaching saturation) were assigned a Ksvalue of 0.5. In (b), the blue circles represent human duplicated genes and the red circles show duplicated genes from mouse and rat. In (d), the blue circles are human-rodent orthologous comparisons, and the red circles are the mouse-rat comparisons. Back to article page