The purpose of this book is to focus attention on recent developments in steroid and sterol hormone action. Many authors have generously contributed to the book. As a result, there is a great diversity of opinion A majority of the chapters deal with steroid or sterol hormone receptors. This is not meant to imply that receptor-mediated mechanisms are the sole or even the most important mechanisms by which steroid hormones act in the cell. There is wealth of evidence showing that other, non-receptor events, are important also. Steroid hormone recep tor research and the study of nuclear events...