Figure 1
From: The molecular phylogeny of eph receptors and ephrin ligands
Unrooted phylogenetic tree for Eph receptors constructed with the Maximum Likelihood method. Numbers represent percentage bootstrap values for 1000 replicates (Maximum likelihood/Neighbour Joining/Minimum Evolution); unlabelled branches or/- indicates a value less that 50%. Three major clades are present: Vertebrate, Urochordate, and a group containing Cephalochordates, Echinoderms, Ecdysozoans, Coelenterate and Sponges. Using the ecdysozoan branch to root the tree does not change the composition of the major groups. Bf, Brachiostoma floridae; Ce, Caenorhabditis elegans; Ci, Ciona intestinalis; Dm, Drosophila melanogaster; Ef, Ephydatia fluviatilis; Hs, Homo sapiens; Nv, Nematostela vectensis; Sp, Strongylocentrotus purpuratus.