Figure 3

Phylogenetic analysis of yaaW protein coded sequences. Minimum Evolution tree of yaaW protein coding sequences (number in branches denotes 1000 bootstraps). A gray vertical bar indicates the branch where htgA overlapped gene hypothetically originated. A star indicates the placement of the root according to the midpoint root method. A, B and O denotes the groups of sequences used to detect the changes in rate evolution of yaaW sequences having and overlapped htgA gene. Node C is a hypothetical ancestral sequence. Darker branches indicate those sequences having the larger number of statistically significant relative rate tests when used as outgroups. Numbers following the names of proteins indicate the following: number of statistically significant comparisons/out of total number of comparisons, level of significance (number of amino acids involved in the relative rate taste). NS stands for: non-significant.