Figure 1.

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.

Mellott and Burke BMC Cell Biology 2008 9:27   doi:10.1186/1471-2121-9-27
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