1. Department of Biomolecular Sciences, The Weizmann Institute of Science, Rehovot 76100, Israel
2. Pharmaceutical Microbiology Section, Institute for Medical Microbiology, Immunology and Parasitology, University of Bonn, Sigmund-Freud-Strasse 25, D-53127 Bonn, Germany
3. Department of Biochemical Sciences A. Rossi Fanelli, Faculty of Pharmacy and Medicine, Sapienza University of Rome, CU27, 00185 Roma, Italy
4. Department of Chemical Research Support, The Weizmann Institute of Science, Rehovot 76100, Israel