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Maintenance of ancestral complexity and non-metazoan genes in two basal cnidarians |
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| Authors: | Technau Ulrich Rudd Stephen Maxwell Peter Gordon Paul M K Saina Michael Grasso Lauretta C Hayward David C Sensen Christoph W Saint Robert Holstein Thomas W Ball Eldon E Miller David J |
| Affiliation: | aSars International Centre for Marine Molecular Biology, University of Bergen, Thormøhlensgt 55, 5008 Bergen, Norway bCentre for Biotechnology, FIN-20521, Turku, Finland cCentre for Bioinformation Science, Australian National University, Canberra, ACT2601, Australia dDepartment of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive N.W., HSC 1150, Calgary, Alberta, Canada, T2N 4N1 eCentre for the Molecular Genetics of Development and Molecular Genetics and Evolution Group, Research School of Biological Sciences, Australian National University, PO Box 475, Canberra, ACT2601, Australia fMolecular Evolution and Genomics, Institute of Zoology, Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany gComparative Genomics Centre, Molecular Sciences Building 21, James Cook University, Townsville, Queensland 4811, Australia |
| Abstract: | Cnidarians are among the simplest extant animals; however EST analyses reveal that they have a remarkably high level of genetic complexity. In this article, we show that the full diversity of metazoan signaling pathways is represented in this phylum, as are antagonists previously known only in chordates. Many of the cnidarian ESTs match genes previously known only in non-animal kingdoms. At least some of these represent ancient genes lost by all bilaterians examined so far, rather than genes gained by recent lateral gene transfer. |
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