Fig. 4
The genes under the strongest selection for translational efficiency (St) are also under the strongest selection to reduce biosynthetic cost (Sc). Scatter plots of gene-specific St and Sc values for (a) Escherichia coli, (b) Lactobacillus amylophilus. In both cases the line of best fit is shown (red), and the yellow dot is the genome-wide best-fit value for each species. Each point has been set to an opacity of 20% so density can be judged. c Histogram of the slope between Sc and St for individual genes for each of the 1320 bacterial species in this analysis