1. Molecular Immunology, Institute for Immunology, Christian-Albrechts-University of Kiel, Building 17, Arnold-Heller-Strasse 3, D-24105 Kiel, Germany, Clinical and Molecular Allergology, Research Center Borstel, Parkallee 22, D-23845 Borstel, Germany, Department of Zoophysiology, Zoological Institute, Christian-Albrechts-University of Kiel, Olshausenstrasse 40, D-24098 Kiel, Germany