Cutting-edge techniques presented with foolproof, step-by-step instructions make this collection indispensable for investigating the structure and function of protein serine/threonine phosphatases. The book contains methods designed to enable the investigator to isolate, identify, and assay phosphatase activities from both prokaryotic and eukaryotic sources, and includes a discussion of the functional significance of this group of enzymes with respect to cell growth and development. Written by leaders with extensive practice in their use, each method is time-tested and sufficiently detailed to ensure reproducibility for both new and established investigators.