Fig. 3

Phylogenetic analysis of the myriapod hemocyanin subunits. A Bayesian phylogenetic tree was inferred from an alignment of myriapod Hc and PPO amino acid sequences (Additional file 5: Figure S2). The displayed tree derived from the analysis of the full 868 amino acid (aa) alignment assuming the WAG model. The numbers at the nodes indicate the Bayesian support values according to the 868 aa alignment/WAG model, 531 aa alignment /WAG model, 868 aa alignment/LG model, 531 aa alignment/LG model. The black dots indicate support values > 0.98 in all four analyses. The bar represents 0.3 PAM distance. Chilopod Hc subunits and PPO are shaded in light grey; the symphylan proteins are shaded in dark grey; the different Hc subunit types are boxed and indicated on the right-hand side. See Additional file 2: Table S2 for the abbreviations