Institution: | From the ‡Department of Molecular Biology, Max-Planck-Institute for Infection Biology, Charitéplatz 1, D-10117 Berlin, Germany.;§Biocenter, Department of Microbiology, University of Würzburg, Am Hubland, 97074 Würzburg, Germany, and ;the ¶Institute of Neuropathology, University Hospital Muenster, Domagkstrasse 19, 48149 Muenster, Germany |