1. Department of Chemistry and Bioscience‐Molecular Biotechnology, Chalmers University of Technology, Box 462, SE‐405 30 Göteborg Sweden
2. The School of Life and Health Sciences, Aston University Aston Triangle, Birmingham B4 7ET UK
3. Institut für Mikrobiologie, Johan Wolfgang Goethe Universität Frankfurt Marie‐curie Strasse 9, 60439 Frankfurt am main Germany
4. Department of Cell and Molecular Biology, Göteborg University Box 462, 40530 Göteburg Sweden