1. Karlsruhe Institute of Technology (KIT) - South Campus, Institute for Applied Biosciences, Dept. of Microbiology, Hertzstrasse 16, D-76187 Karlsruhe, Germany
2. Karlsruhe Institute of Technology (KIT) - South Campus, Institute for Applied Physics and Center for Functional Nanostructures, 76131 Karlsruhe, Germany
3. University of Tsukuba, Faculty of Life and Environmental Sciences, Tsukuba, Ibaraki 305-8572, Japan