Affiliation: | 1. Department of Chemistry and Pharmaceutical Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam (The Netherlands), Fax: (+31)?20‐598‐7488;2. Department of Chemistry and Applied Biosciences, ETH‐H?nggerberg, Wolfgang‐Pauli‐Strasse, 8093 Zurich (Switzerland);3. Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University (The Netherlands) |