Fig. 3
From: The evolutionary dynamics of tRNA-gene copy number and codon-use in E. coli.
The enrichment of O157:H7 strains correlates with the tRNAAGA gene copy number. a. A phylogeny of sequenced O157:H7 strains (Methods). Numbers above the red arrow indicate where putative LGT genes are binned as occurring before the divergence of the node indicated. The column to the right shows the number of tRNAAGA genes that can be found in each genome. b. The number of tRNAAGA genes is plotted against the proportion of all arginine sites encoded by AGA in the LGT originating genes. The exact numbers used for plotting this figure can be found in Table 3. The genes corresponding to nodes 2, 3, 4 and 5 are provided in supplementary data