1. Microbiology & Biotechnology Institute of Plant Sciences and Microbiology, University of Hamburg Hamburg 22609 Germany
2. Genomic and Applied Microbiology & Göttingen Genomics Laboratory Georg‐August University Göttingen Göttingen 37077 Germany
3. Mass Spectrometric Proteomics Group, Department of Clinical Chemistry and Laboratory Medicine University Medical Center Hamburg‐Eppendorf (UKE) Hamburg 20246 Germany