Correspondence analysis of relative synonymous codon usage for Escherichia coli K12 genes:
% variability
Axis 1
16.3
Axis 2
7.8
Axis 3
4.0
Axis 4
3.7
Axis 5
3.4
Axis 6
3.1
Red (), blue () and green squares () correspond to genes proposed as being acquired by HGT and included in regions with a low, high and non-deviated G+C content, respectively. Yellow cross diagonals (x) correspond to putative highly expressed genes.
Correlation values between main axis in correspondence analysis and different parameters. See the Abbreviations used: