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. 2013 Sep;94(Pt 9):2082–2093. doi: 10.1099/vir.0.052837-0

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Fig. 4. — Four F/A/R genes with elevated d_N/d_S values identified using branch-based tests. Phylogenies with free-ratio results for genes with branches exhibiting signatures of d_N/d_S>1 are presented. Branch values of d_N/d_S are shown, along with the estimated numbers of non-synonymous and synonymous (N : S) mutations that are predicted to have occurred along each branch (in parentheses). Branches with d_N/d_S values >1 are shown in bold. Branches with incalculable d_N/d_S values (due to S = 0) are highlighted in bold if the ratio of N : S was greater than or equal to 4 : 0. Genes with an asterisk were also found to exhibit signatures of positive selection under site-based tests (Table 2). Note variation in the topologies of ORF71R and ORF93L due to slightly different gene trees.