<prompt> In apoptosis initiation:The death receptors induce apoptosis when they get engaged by fas ligated systemCytochrome C inhibits Apoptosis activating factor -1Apoptosis may be initiated by caspase activationApoptosis mediated through DNA damage  <response>: The death receptors induce apoptosis when they get engaged by fas ligand system Ref, Robbins 9e p56. 