Gene tree built using the Bayesian Inference method with MrBayes 3.1.2. The main taxonomic groups are highlighted. Amino acids at positions 96 and 137 in the multiple alignments are indicated; the group characterized by Trp and Leu is indicated.
Raimondi et al. BMC Evolutionary Biology 2011 11:159 doi:10.1186/1471-2148-11-159