Affiliation: | 1. NMR Supported Structural Biology, Leibniz‐Institute for Molecular Pharmacology (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany), Fax: (+49)?30‐9479‐3199;2. Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (USA) |