1. Dept. for NMR‐based Structural Biology, Max‐Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen (Germany)
2. Dept. for Theoretical and Computational Biophysics, Max‐Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen (Germany)
3. Present Address: Dept. for Structural Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105 (USA)