Phylogenetic tree of the SGS genes, AAEL004181 in Ae. aegypti and homologous sequences in Wolbachia. The fragments of the AAEL004181 homolog sequenced from Ae. mascarensis are highly similar to AAEL004181, and are not shown here. Boostrap values from the ML analysis of 1000 replicates are shown above the branches and posterior probabilities from the Bayesian analysis are shown beneath the branches.