1. CNRS UMR 7213, Laboratoire de Biophotonique et Pharmacologie, Faculté de Pharmacie, 74 route du Rhin, B.P. 60024, 67401 Illkirch Cedex, France.
2. Section of Molecular and Cellular Biology, University of California at Davis One Shields Avenue, Davis, CA 95616, USA.
3. Sbarro Institute for Cancer Research and Molecular Medicine, Center of Biotechnology, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122, USA.
4. Structural Genomics Consortium, University of Toronto, 100 College Street, Toronto, Ontario M5G 1L5, Canada.
5. Department of Physiology, University of Toronto, 100 College Street, Toronto, Ontario M5G 1L5, Canada.