Genome-wide analysis of the Emigrant family of MITEs: amplification dynamics and evolution of genes in Arabidopsis thaliana Néstor Santiago 1 , Cristina Herráiz 2 , J. Ramón Goñi 2 , Xavier Messeguer 2 , Josep M. Casacuberta 1 * Dep. Genètica Molecular, IBMB-CSIC, Barcelona 1 , Dep. Llenguatges i Sistemes Informàtics, Universitat Politècnica de Catalunya 2 . *Correspondence address: Dep. Genètica Molecular. IBMB-CSIC. Jordi Girona18 08034 Barcelona, Spain Tel. 34 93 400 61 42; Fax. 34 93 204 59 04 Email: jcsgmp@cid.csic.es Running title: Emigrant amplification dynamics and gene evolution Key words: Arabidopsis, evolution, MITE, Emigrant, master element.