This all-new edition of a best-selling text has been thoroughly updated to keep pace with the rapid progress in signal transduction research. With didactic skill and clarity, the molecular basis of signal transduction, regulated gene expression, the cell cycle, tumorigenesis and apoptosis is made transparent for everyone with a basic knowledge in biochemistry or molecular biology. "Valuable up-to-date information on biochemistry of signal transduction and regulation" (AFS) "The clear and didactic presentation makes it a textbook very useful for students and researchers not familiar with all aspects of cell regulation." (Biochemistry) "This book is actually two books: Regulation and Signal Transduction." (Drug Research)