DUAL FUNCTIONS. “Molecular effectors of cell suicide may also perform other functions unrelated to cell death induction and crucial to cell survival. In this review, I will argue that this new level of complexity, implying that there may be no such thing as a ‘bona fide’ genetic death program in our cells, might be better understood when considered in an evolutionary context.”
http://www.nature.com/cdd/journal/v9/n4/full/4400950a.html