Affiliation: | 1. Christian Zwieb, Department of Molecular Biology, The University of Texas Health Science Center, PO Box 2003, Tyler, Texas 75710, USA;2. Florian Müller, Max Planck Institute for Molecular Genetics, Ihnestraße 73, D14195, Berlin, Germany;3. Niels Larsen, Department of Microbiology, Giltner Hall, Room 180, Michigan State University, East Lansing, Missouri 48824, USA |