BMC Evolutionary Biology BioMed Central Research article Open Access Phylogenetic analysis of the tenascin gene family: evidence of origin early in the chordate lineage RP Tucker*1, K Drabikowski*2,4, JF Hess1, J Ferralli2, R Chiquet-Ehrismann2 and JC Adams3 Address: 1Department of Cell Biology and Human Anatomy, University of California at Davis, Davis, CA 95616, USA, 2Friedrich Miescher Institute, Novartis Research Foundation, Basel, Switzerland, 3Dept. of Cell Biology, Lerner Research Institute and Dept. of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland Clinic Foundation, Cleveland, OH 44118, USA and 4Institute of Biology 3, University of Freiburg, Freiburg, Germany Email: RP Tucker* -
[email protected]; K Drabikowski* -
[email protected]; JF Hess -
[email protected]; J Ferralli -
[email protected]; R Chiquet-Ehrismann -
[email protected]; JC Adams -
[email protected] * Corresponding authors Published: 07 August 2006 Received: 24 February 2006 Accepted: 07 August 2006 BMC Evolutionary Biology 2006, 6:60 doi:10.1186/1471-2148-6-60 This article is available from: http://www.biomedcentral.com/1471-2148/6/60 © 2006 Tucker et al; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract Background: Tenascins are a family of glycoproteins