1. Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
2. Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
3. Institute of Biochemistry and Molecular Biology, ZBMZ, Stefan‐Meier‐Strasse 17, D‐79104 Freiburg, Germany