This volume addresses the analytical chemistry involved in identifying and quantifying the toxin proteins present in various varieties of Bacillus thuringiensis (Bt). It concentrates on describing and utilizing analytical techniques for characterizing the insect-active inclusion proteins and exotoxins produced by Bt, including bioassay, DNA probes, immunoassay, polyacrylamide gel electrophoresis, in vitro assays, HPLC, and multi-parameter light scattering technology. It brings together an interdisciplinary group of scientists to discuss multiple approaches to a complex problem. Useful for both the layman and professional, this volume serves as a central reference for the major analytical techniques used in characterizing Bt toxins.