Associate Editors
Lynn Margulis, University of Massachusetts-Amherst, MA, USA
Moselio Schaechter, San Diego State University, CA, USA
John Skehel, National Institute for Medical Research, London, UK
Marle-Odile Soyer-Gobillard, Oceanographic Observatory, CNRS, Banyuls, France
Hans G. Trüper, University of Bonn, Germany

Editorial Board
Ricardo Amils, Autonomous University of Madrid, Spain
Albert Bordons, University Rovira Virgili, Tarragona, Spain
Albert Bosch, University of Barcelona, Spain
Enrico Cabib, National Institutes of Health, Bethesda, MD, USA
Douglas Caldwell, University of Saskatchewan, Saskatoon, Canada
Victoriano Campos, Catholic University of Valparaiso, Chile
Josep Casadesús, University of Sevilla, Spain
Yehuda Cohen, The Hebrew University of Jerusalem, Israel
Rita R. Colwell, University of Maryland, Biotechnology Institute, College Park, MD, USA
Katerina Demnerová, Institute of Chemical Technology, Prague, Czech Republic
Esteban Domingo, Center for Molecular Biology, CSIC-UAM, Cantoblanco, Spain
Mariano Esteban, National Center for Biotechnology, CSIC, Cantoblanco, Spain
M. Luisa García López, University of Leon, Spain
Steven D. Goodwin, University of Massachusetts-Amherst, MA, USA
Juan C. Gutiérrez, Complutense University of Madrid, Spain
Jennie C. Hunter-Cevera, University of Maryland Biotecnology Institute, College Park, MD, USA
Johannes F. Imhoff, University of Kiel, Germany
Juan Imperial, Technical University of Madrid, Spain
John L. Ingraham, University of California-Davis, CA, USA
Juan Iriberri, University of the Basque Country, Bilbao, Spain
Roberto Kolter, Harvard University Medical School, Boston, MA, USA
German Larriba, University of Extremadura, Badajoz, Spain
Paloma Liras, University of León, Spain
Rubens López, Center for Biological Researeh, CSIC, Madrid, Spain
Juan M. López Pila, Institute for Environmental Hygiene, Berlin, Germany
Michael J. Madigan, University of Southern Illinois, Carbondale, IL, USA
M. Benjamin Manzanal, University of Oviedo, Spain
Beatriz S. Méndez, University of Buenos Aires, Argentina
Diego A. Moreno, Technical University of Madrid, Spain
Ignacio Moriyón, University of Navarra, Pamplona, Spain
David A. A. Mossel, Eijkman Foundation for Medical Research, Utrecht, The Netherlands
José Olivares, Experimental Station of Zaidín, CSIC, Granada, Spain
Juan A. Ordoñez, Complutense University of Madrid, Spain
Eduardo Orias, University of California-Santa Barbara, CA, USA
José M. Peinado, Complutense University of Madrid, Spain
J. Claudio Pérez Diaz, Ramon y Cajal Hospital, Madrid, Spain
Antonio G. Pisabarro, Public University of Navarra, Spain
Carmina Rodríguez, Complutense University of Madrid, Spain
Manuel de la Rosa, Virgen de las Nieves Hospital, Granada, Spain
Tomás A. Ruiz Argüeso, Technical University of Madrid, Spain
Miguel Sánchez, University of Salamanca, Spain
Hans G. Schlegel, University of Göttingen, Germany
James A. Shapiro, University of Chicago, IL, USA
John Stolz, Duquesne University, Pittsburgh, PA, USA
James Strick, Johns Hopkins University, Baltimore, MD, USA
Jean Swings, University of Ghent, Belgium
Gary A. Toranzos, University of Puerto Rico, Rio Piedras, Puerto Rico
Antonio Torres, University of Sevilla, Spain
Josep M. Torres-Rodríguez, IMIM, Barcelona, Spain
José A. Vázquez-Boland, Complutense University of Madrid, Spain
Antonio Ventosa, University of Sevilla, Spain
Tomás G. Villa, University of Santiago de Compostela, Spain
Miquel Viñas, University of Barcelona, Spain
Dolors Xairó, Biomat, S.A., Grifols Group, Parets del Vallés, Spain