Figure 4.

Compressed subtree sequenced data for pmrA gene of 8 subspecies of Enterobacteriaceae based upon Neighbor-Joining method [[33]]. Subtrees presented in Figure 2 are compressed into black triangle. The numbers at the nodes indicate the levels of bootstrap support based on a Neighbor-Joining analysis of 500 resampled data sets. The evolutionary distances were computed using the Maximum Composite Likelihood method [34] and are in the units of the number of base substitutions per site. The generation of tree was conducted in MEGA5 [32].