Figure 2
Phylogenetic relationships of Hypsibius dujardini P2X. Aligned protein sequences from P2X homologues from H. dujardini (Hd) (Tardigrada), vertebrates (represented by human (h), mouse (m) and rat (r); these taxa have seven paralogous P2X genes (P2X1–7)), S. mansoni (Sm) (Platyhelminthes), L. stagnalis (Lym) (Mollusca), M. brevicollis (Mb) (Choanoflagellida), D. discoideum (d) (Mycetozoa; Dictyosteliida; five paralogues) and two Ostreococcus species, O. tauri (Ot) and O. lucimarinus (Ol) (Chlorophyta; Prasinophyceae) were analysed using Neighbour Joining and maximum parsimony methods. Both methods agreed on the well supported nodes figured in this phylogram. Nodes were supported with bootstraps of 100% unless otherwise indicated; all nodes with less than 75% bootstrap support were collapsed.