Institution: | From the ‡CNRS, Institut de Pharmacologie et de Biologie Structurale (IPBS), 205 route de Narbonne, F-31077 Toulouse, France, ;the §Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France, and ;the ¶Laboratory of Viral Diseases, NIAID, National Institutes of Health, Bethesda, Maryland 20892 |