Contents. List of Contributors. Preface (D. LeRoith). Molecular Aspects of Prolactin and Growth Hormone Receptors (V. Goffin, F. Ferrag, and P.A. Kelly). Molecular Aspects of Growth Hormone Action (M.J. Thomas and P. Rotwein). Leptin (M. Reitman). Cellular Mechanisms of Signal Transduction for Growth Factors (A.R. Saltiel). Tissue Specific Expression of the CYP19 (Aromatase) Gene (E.R. Simpson, M.D. Michael, V.R. Agarwal, M.M. Hinselwood, S.E. Bulun, and Y. Zhao). Molecular Aspects of Precocious Puberty (W. Chan and G.B. Cutler, Jr.). Two Genes-One Disease: The Molecular Basis of Congenital Nephrogenic Diabetes Insipidus (W. Rosenthal, A. Oksche, and D.G. Bichet). Mechanisms of Radiation-Induced Carcinogenesis: The Thyroid Model (Y.E. Nikiforov and J.A. Fagin). Index.