The interest of investigators across a broad spectrum of scientific dis- plines has been steadily stimulated by the field of bacterial toxin research, an area that makes use of a large variety of biological, chemical, physicochemical, and medically oriented approaches. Researchers studying bacterial toxins need to be acquainted with all these disciplines in order to work effectively in the field. To date, there has been no published collection offering detailed descr- tions of the techniques and methods needed by researchers operating across the field’sdiverse areas. The present volume Bacterial Toxins: Methods and Pro- cols, is intended to fill this gap. Bacterial Toxins: Methods and Prools consists of two sections: one on protein toxins (15 chapters) and one on endotoxins (5 chapters). Each s- tion is introduced by an overview article (Chapters 1 and 16). The prools collected represent state-of-the-art techniques that each have high impact on future bacterial toxin research. All methods are described by authors who have regularly been using the prool in their own laboratories. Included in each chapter is a brief introduction to the method being described.