Institution: | From the ‡Department of Chemistry, Physical Chemistry 1, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany, ;the Departments of §Pathology and ;‖Microbiology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, and ;the ¶Medical Research Council National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, United Kingdom |