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Fig. 4 | BMC Evolutionary Biology

Fig. 4

From: The evolutionary dynamics of tRNA-gene copy number and codon-use in E. coli.

Fig. 4

Multicopy tRNAAGA genes of Shigella and O157:H7 and their genomic context. a. The glyT and thrU genes of S. flexneri 2A 2547T often occur together, however the DNA sequence immediately flanking the insertion site of additional copies are flanked by phage (orange boxes), rather than bacterial genes (purple boxes). Closest flanking genes were determined by genome specific BLAST search. Percentages indicate degree of sequence identity to the gene designated as the original host copy b. The tRNAAGA genes argU and argO of O157:H7 Sakai. Percentages indicate the sequence identity to the gene annotated as argO1 in the O157:H7 Sakai genome. c and d, The positions of tRNA gene insertions across the genome for Shigella flexneri 2A 2475 t and O157:H7 Sakai. Precise numbers and sites of insertion vary for other members of the O157:H7 and Shigella subgroups

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