Volume 322 of Methods in Enzymology is dedicated to apoptosis. Major topics covered include measuring apoptosis and apoptosis-induced endonucleases, measuring apoptosis in lower organisms, proteases involved in apoptosis and their inhibitors, cell free systems for monitoring steps in apoptosis pathways, mitochondria and apoptosis, bCl-2 family proteins, and studying receptors and signal transduction events implicated in cell survival and cell death. The critically acclaimed laboratory standard for more than forty years, Methods in Enzymology is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with more than 300 volumes (all of them still in print), the series contains much material still relevant today — truly an essential publication for researchers in all fields of life sciences.