Apoptosis Video Demonstrates a model of a caspase cascade as it occurs in vivo.
The Mechanisms of Apoptosis (页面存档备份,存于互联网档案馆) Kimball's Biology Pages. Simple explanation of the mechanisms of apoptosis triggered by internal signals (bcl-2), along the caspase-9, caspase-3 and caspase-7 pathway; and by external signals (FAS and TNF), along the caspase 8 pathway. Accessed 25 March 2007.