1. Department of Chemical BiologyMax-Planck-Institute of Molecular Physiology Otto-Hahn-Strasse 11 44227 Dortmund Germany
2. Current address: Laboratory of Catalysis and Organic SynthesisEPFL SB ISIC LCSO, BCH 4221 1015 Lausanne Switzerland
3. Current address: School of ChemistryUniversity of Leeds Leeds LS2 9JT UK
4. Faculty of Chemistry and Chemical BiologyTechnical University Dortmund Otto-Hahn-Strasse 6 44227 Dortmund Germany
5. Compound Management and Screening Center, Dortmund Otto-Hahn-Strasse 11 44227 Dortmund Germany
6. Department of ChemistryUmeå University 901 87 Umeå Sweden
7. Current address: Clinical Chemistry, Laboratory MedicineUniversity Hospital of Umeå 901 85 Umeå Sweden
8. Current address: Department of ChemistryTechnical University of Denmark Kemitorvet, Bygning 207 2800 Kgs Lyngby Denmark
9. Department of Molecular Cell BiologyInstitute of Biochemistry and PathobiochemistryRuhr University Bochum 44801 Bochum Germany