| Affiliation: | 1. Abteilung für NMR‐basierte Strukturbiologie, Max‐Planck‐Institut für Biophysikalische Chemie, Am Fassberg 11, 37077 G?ttingen, Germany, Fax: (+49)?551‐201‐2202;2. M. Reese and Dr. V.?M. Sánchez‐Pedregal contributed equally to this work.;3. Present address: Departamento Química Orgánica, Facultad de Química, Universidad de Santiago de Compostela, Campus Universitario Sur, s/n, 15782 Santiago de Compostela, Spain;4. Center for Structural Biology, Vanderbilt University, BIOSCI/MRBIII, 654 21st Avenue South, Nashville, TN 37212, USA;5. Novartis Institutes for Biomedical Research, P.O. Box, 4002 Basel, Switzerland |
