Figure 3.

Evolutionary relationships of the fourteen PGRP-S2/3 protein types. The evolutionary history was inferred using the Neighbor-Joining method. The bootstrap consensus tree was inferred from 1000 replicates. Tree was drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the Poisson correction method and are in the units of the number of amino acid substitutions per site. Red dots represent PGRP-S2 proteins, blue dots represent PGRP-S3 proteins and purple represent protein types shared by PGRP-S2 and PGRP-S3.