1. Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
2. Leicester Institute of Structural and Chemical Biology and School of Chemistry, University of Leicester, University Road, LE1 7RH Leicester, U.K.
3. Lead Discovery Center GmbH, 44227 Dortmund, Germany