1. Department
of Molecular Biology, University of Salzburg, Billrothstrasse 11, A-5020 Salzburg, Austria
2. Protein
Crystallography Group, Leibniz Institute on Aging, Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, 07745 Jena, Germany
3. Department
of Pharmaceutical Chemistry, Philipps University Marburg, Marbacher Weg
6, D-35032 Marburg, Germany