1. Interfaculty Institute for Genetics and Functional Genomics; University of Greifswald; Friedrich-Ludwig-Jahn-Strasse 15a D-17487 Greifswald Germany
2. Helmholtz-Centre for Environmental Research-UFZ; Department of Proteomics; Permoserstrasse 15 D-04318 Leipzig Germany
3. Helmholtz-Centre for Environmental Research-UFZ; Department of Isotope Biogeochemistry; Permoserstrasse 15 D-04318 Leipzig Germany