This book is intended to provide an in-depth understanding of 13C NMR as a tool in biological research. 13C NMR has provided unique information concerning complex biological systems, from proteins and nucleic acids to animals and humans. The subjects addressed include multidimensional heteronuclear techniques for structural studies of molecules in the liquid and solid states, the investigation of interactions in model membranes, the elucidation of metabolic pathwaysin vitro and in vivo on animals, and noninvasive metabolic studies performed on humans. The book is a unique mix of NMR methods and biological applications which makes it a convenient reference for those interested in research in this interdisciplinary area of physics, chemistry, biology, and medicine. An interdisciplinary text with emphasis on both 13C NMR methodology and the relevant biological and biomedical issues State-of-the-art 13C NMR techniques are described; Whenever possible, their advantages over other approaches are emphasized The chapters constitute comprehensive reviews and are written by acknowledged experts in their fields Chapters are written in a clear style, and include a large number of illustrations and comprehensive references