1. Department of Biology I, Großhaderner Straße 2–4, D-82152 Martinsried, Germany
2. Department of Microbial Ecology and Diversity Research, Leibniz Institut DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen, Braunschweig, Germany
3. Ludwig-Maximilians-Universität München, Department of Biology I, Großhaderner Straße 2–4, D-82152 Martinsried, Germany
4. Central Facility for Microscopy, Helmholtz Centre for Infection Research, Braunschweig, Germany
5. Technische Universität Braunschweig, Braunschweig, Germany