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. 2012 Feb 28;11(2):89–95. doi: 10.1093/bfgp/els003

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© The Author (2012). Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1: — Phylogenetic relationships between species used in this study. The 11 animals diverged from a common eumetazoan ancestor more than 500 million years ago. Branch lengths are not to scale. Nematostella vectensis: sea anemone; Caenorhabditis elegans: nematode; Drosophila melanogaster: fruit fly; Strongylocentrotus purpuratus: sea urchin; Branchiostoma floridae: amphioxus; Oikopleura dioica: tunicate; Ciona intestinalis and Ciona savignyi: sea squirts; Homo sapiens: human; Gallus gallus: chicken; Danio rerio: zebrafish.