Figure 6

Phylogenetic trees created using Maximum Likelihood GTR+gamma for each functionally defined gene class. Branches with significantly higher (LRT, p < 0.01) rates of synonymous substitution per site are thickened. Branches with significantly higher d N /d S are marked with one (p < 0.01), two, (p < 0.001), or three asterisks (p < 0.0001). Values of d S and d N /d S on relevant branches are given in Table 3.