1. Institut de Chimie Organique et Analytique, UMR CNRS-Université d’Orléans 7311, Université
d’Orléans BP 6759, Orléans 45067 Cedex 2, France
2. Department of Medical Protein Research, VIB, Ghent B-9000, Belgium
3. Department of Biochemistry, Ghent University, Ghent B-9000, Belgium
4. Janssen Research and Development, a division of Janssen Pharmaceutica N.V., Turnhoutseweg 30, Beerse 2340, Belgium