Figure 2. Evolutionary relationship among septins of humans and Schistosoma mansoni.

Phylogenetic tree (based on Bayesian inference) generated from a multiple alignment of the conserved GTPase domains of septins from S. mansoni and two other informative protostomes and three deuterostomes. The numbers on the tree nodes are posterior probabilities calculated by MrBayes. Branches with the four discrete groups of septins are enclosed by the dotted lines. Species are identified by the small circles of different shapes and colors as indicated in the lower panel.