Abstract

Apoptosis (programmed cell death) is an evolutionarily conserved cellular process, important for development and homeostasis. Most apoptotic cells share a common set of morphological and physiological characteristics that distinguish them from necrotic deaths. While genetic studies have indicated that these characteristic changes result from the activation of an endogenous 'suicide program', little is known about the nature of this program and the molecular events underlying these changes. Two recent papers describing cell-free extracts that reproduce several of the characteristic changes observed in apoptotic cells promise to make these phenomena accessible to biochemical analysis.