1. Departments of Pharmaceutical Sciences, Chemistry, and Molecular Biology and BiochemistryUniversity of California 101 Theory Irvine CA 92617 USA
2. Medicinal Chemistry, Rega Institute for Medical ResearchKU Leuven Herestraat 49 Box 1041 3000 Leuven Belgium
3. Department of Structural Biology and ChemistryInstitut Pasteur 28 rue du Docteur Roux 75724 Paris France