1. Institute of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
2. Faculty of Science, Charles University, Prague 12843, Czech Republic
3. Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
4. Bruker Daltonics GmbH & Co KG, Fahrenheitstraße 4, 28359 Bremen, Germany
5. Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM, U596, CNRS, UMR7104, Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch-Graffenstaden, France