N. Morishima, K. Nakanishi, H. Takenouchi, T. Shibata and Y. Yasuhiko. An endoplasmic reticulum stress-specific caspase cas- cade in apoptosis. Cytochrome c-independent activation of cas- pase-9 by caspase-12. Journal of Biological Chemistry, 2002, 277(37): 34287-34294.