Since the nineteenth century, when engineers were using nitroglycerin to blow up rockbeds, and doctors were prescribing it to relieve angina, scientists have been exploring the incredible and often baffling behavior of nitric oxide. In the 1980s, researchers discovered that nitric oxide had the capacity to regulate vascular tone through cyclic GMP, firmly establishing its role as a physiological mediator. Over the last ten years, still further roles have been discovered that relate to nitric oxide's unique ability to interact with and modify a wide variety of other molecules and regulators including glutathione, as well as macromolecules such as DNA and proteins. Nitric Oxide, Cell Signaling, and Gene Expression is the first comprehensive work to showcase the highly useful diversity of cellular effects elicited by nitric oxide. A collection of expert contributors provides cutting-edge information on a variety of topics with tremendous implications in the fields of biology and medicine.