1. INSERM, U-344, Molecular Endocrinology, Faculté de Médecine Necker (S.B., S.K., S.J., M.L., P.A.K., V.G.), 75730 Paris, France
2. Laboratory of Molecular Biology and Genetic Engineering, University of Liege (S.K., J.A.M.), 4000 Sart-Tilman, Belgium
3. Laboratory of Molecular Biophysics, Institut de Biologie Structurale, Commissariat à l’énergie atomique-Centre National de la Recherche Scientifique (D.M.), 38027 Grenoble, France