The volume describes the three-dimensional structural features of the molecules underlying the physiologic functions of biologic membranes. While this book has a rather clear focus on the membrane, as a major component of any cell, it will also cover the other crucially important functions within cells, further enhancing and deepening the understanding of biologic function. This knowledge is believed to be vital in the development of new pharmaceutical modalities, given that almost 50% of drug targets are thought to be membrane proteins. This book is designed to be a reference text for a broad range of readers, from researchers in a variety of scientific and related medical fields, to graduate students working in these specialties. ​