Biochemical Actions of Hormones, Volume V explores the nature of interaction of multiple hormones in regulating specific phenotypes. This volume is organized into 11 chapters that include discussions on the developments in the understanding of the biochemistry and molecular biology of hormones. The opening chapters deal with the modifications of chromatin structure by hormones, the regulation of exocytosis, ontogeny of estrogen receptors, and the hormonal regulation of cells of the seminiferous tubule. The discussions then shift to the advances on the progesterone receptor, the role of glucocorticoids in the integration of mammary tumor virus genes, and a model system for estrogen action. Other chapters examine the physiology, molecular action, and biological effects of somatomedins, epidermal growth factors and 1,25-dihydroxyvitamin. The remaining chapters focus on multihormone control of mRNA for a specific hepatic protein. This book is of great value to endocrinologists.