1. Department for NMR-based Structural Biology; Max Planck Institute for Biophysical Chemistry; Am Fassberg 11 37077 Göttingen Germany
2. Department of Molecular Biophysics; Leibniz-Institut für Molekulare Pharmakologie (FMP); 13125 Berlin Germany
3. Institut für Biologie; Humboldt-Universität zu Berlin; 10115 Berlin Germany
4. JEOL RESONANCE Inc.; 3-1-2 Musashino Akishima Tokyo 196-8558 Japan
5. RIKEN CLST-JEOL Collaboration Center, Suehiro-cho, Tsurumi; Yokohama Kanagawa 230-0045 Japan
6. Institut für Anorganische Chemie; Universität Göttingen; Tammannstrasse 4 37077 Göttingen Germany