Neighbor-joining tree of invertebrate PGRP amino acid sequences. Circles on nodes indicate orthologous pairs of genes. The analysed sequences contain 207 amino acid sites. The evolutionary distances were computed using the Poisson correction method and are in the units of the number of amino acid substitutions per site. All positions containing gaps and missing data were eliminated from the dataset. Notation of species names are indicated as follows: Anga (Anopheles gambiae), Apme (Apis mellifera), Bomo (Bombyx mori), Drme (Drosophila melanogaster), Hodi (Holotrichia diomphalia), and Trca (Tribolium castaneum).
Montaño et al. BMC Evolutionary Biology 2011 11:79 doi:10.1186/1471-2148-11-79