1. Laboratory of Metabolism, National Cancer Institute (K.M., Y.I., F.J.G.), Bethesda, Maryland 20892
2. Institut National de la Santé et de la Recherche Médicale, Unité 539 (G.L.), Hotel Dieu, 44000 Nantes, France
3. Molecular Disease Branch, National Heart, Lung, and Blood Institute (H.B.B.), Bethesda, Maryland 20892
4. Comparative Medicine Branch, National Institutes of Allergy and Infectious Diseases (J.M.W.), Bethesda, Maryland 20892
5. Diabetes Branch, National Institute of Diabetes and Digestive and Kidney Diseases (D.L.), National Institutes of Health, Bethesda, Maryland 20892