1. Institute for Molecular Biosciences and Center for Biomolecular Magnetic Resonance (BMRZ), Goethe-University Frankfurt, Max-von-Laue-Strasse 9, 60438 Frankfurt/M., Germany
2. Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Bavaria, Germany
3. Institute of Organic Chemistry, Centre for Molecular Biosciences (CMBI), University of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
4. Bioinformatics Group, Department of Computer Science and Interdisciplinary Centre for Bioinformatics, Institute of Informatics, University of Leipzig, Härtelstrasse 16-18, 04107 Leipzig, Germany