Involvement of a unique family of cysteine proteases in the multistep
apoptotic process has been documented. Cloning of several mammalian ge
nes identifies some components of this cellular response. However, it
is currently unclear which protease plays a role as a signal and/or ef
fector of apoptosis. We summarize contributions to the data concerning
proteases in Fas-mediated apoptosis. (C) 1997 Wiley-Liss, Inc.