It is now something of a truism to say that natural toxins form a major compo nent of the molecular tools used increasingly frequently by the ever growing number of laboratories of various kinds. Evidence for this is provided not only by the increasing number of firms including such toxins in their catalogues but also by the large number of demands received by those who discover new tox ins. This book is designed to facilitate the work of scientists interested in explor ing a new domain of toxicology or in using toxins as tools for research. The length of this book has been kept reasonable by...