Figure 3
Synonymous codon usage and codon volatility compared with the composition of GC at the third position. Codon usage bias, the major contributing axis (Axis 1), is compared to the composition of G and C at the 3rd position of codons. Those genes with significant codon volatilities are overlayed in pale grey. The linear regression for codon usage compared to GC3 composition is shown as the solid line, R2 = 0.2566 (equation shown on graph, y = −0.1805x + 0.0888). The linear regression for the codon usage compared to GC3 composition for those genes with significant volatility scores are shown as a dashed line, R2 = 0.2281 (equation shown on graph, y = −0.1864x + 0.0892).