Genealogy of the Caenorhabditis invertebrate-type lysozymes, including A, the unrooted tree topology with branch-lengths inferred from DNA sequence analysis, and B, the tree topology with branch-names used in the analysis of positive selection across branches. The tree was inferred with maximum likelihood. In A, values before and after slashes refer to the bootstrap results inferred from protein and DNA sequence analysis, respectively. Only bootstrap values larger than 50 are shown. Branches in A are drawn in proportion to the estimated number of substitutions per site, as indicated by the bar in the bottom left corner. Red-coloured branches indicate those inferred to be under positive selection. The unrooted topology is the most appropriate representation of the genealogy since the exact position of the root is unknown. The representation in B serves to illustrate branch-names for the analysis of positive selection; the branch-names are identical to those given in Table 3.
Schulenburg and Boehnisch BMC Evolutionary Biology 2008 8:114 doi:10.1186/1471-2148-8-114