Molecular control of life and death.

Recent evidence has shown that two of the three key genes in the programmed cell death pathway of Caenorhabditis elegans, ced-9 (a cell death suppressor) and ced-3 (a cell death inducer), encode proteins that share structural and functional similarities with the mammalian proto-oncogene product Bcl-2 and interleukin-1 beta converting enzyme, respectively. These findings reveal key molecules that control life and death decisions in vertebrates.