Phylogram of STE kinases. Kinase domains from the TriTryp predicted proteins classified as STE by BLAST or STE-like from the T. brucei tree in Figure 2 were analyzed using MRBAYES. Also included are STEs from all families present in humans (Hs), plus examples from S. cerevisiae (Sc), C. elegans (Ce) and D. melanogaster (Dm). Nodes with a bootstrap value greater than 0.95 are marked by a dot, while values ranging from 0.7–0.95 are indicated numerically. Similar results were obtained with PAUP*. Gene names are shown as in Figure 4. ScTPK1, an AGC kinase, used as an outgroup.