1. Institute of Groundwater Ecology, Helmholtz Zentrum Munchen, Ingolstadter Landstraße 1, 85764 Neuherberg, Bavaria, Germany
2. Center for Microbial Ecology and Technology (CMET), Faculty of Bioscience Engineering, University of Ghent, Coupure Links 653, 9000 Ghent, Belgium
3. Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Lichtenbergstr. 4, D-85748 Garching, Germany
4. Core Facility Proteomics, Helmholtz Zentrum München, Heidemannstr. 1, 80939 Munich, Germany