The study of signal transduction mechanisms has become one of the most important branches of biomedical science, indispensable to understanding the normal actions of hormones, neurotransmitters and other extracellular signaling molecules as well as many pathophysiological processes, including inflammation and cancer. In this volume, the various techniques for measuring Ca2+ in the cytosol, in the various organelles, and in the immediate surroundings of individual cells are described in practical detail by experts. Also included is a chapter on tracking calmodulin inside cells using fluorescence technology. A Springer Lab Manual