Fig_S1.pdf

Histograms of codon usage in proteobacteria. The average usage of each codon was calculated for 1484 species of proteobacteria. The histograms show the number of genomes that present each range of codon usage considering either all genes of each genome (purple) or a subset of genes expected to be highly expressed (green). Codon usages are expressed as the ratio between the number of codon of each identity and the total number of codons. Each page of the pdf file presents the histogram of the indicated codons.