This is a collection of cutting-edge techniques for detecting and quantifying apoptosis, understanding its biochemistry, and for identifying the genes and proteins that regulate and carry it out. Described in step-by-step detail, these readily reproducible methods range from flow cytometry and immunohistochemical procedures to kinase activity assays, yeast two-hybrid screening, and the cloning of novel genes by differential expression. The protocols follow the successful "Methods in Molecular Biology" series format, each one offering step-by-step laboratory instructions, an introduction outlining the principle behind the technique, lists of equipment and reagents, and tips on troubleshooting and avoiding known pitfalls. "Apoptosis Methods and Protocols" constitutes a key technical reference to the significant methodologies used in the field, as well as offering novice and experienced researchers alike powerful tools to illuminate the phenomenon of programmed cell death.