Institution: | From the ‡Institute of Molecular Biology and Biotechnology-FoRTH and ;§Department of Biology-University of Crete, P.O. Box 1385, Iraklio, Crete, Greece; ;¶Laboratory of Molecular Bacteriology; Rega Institute, Department of Microbiology and Immunology, KU Leuven, Herrestraat 49, B-3000 Leuven, Belgium |