For each of the following proteins that are proteolytically cleaved in apoptosis, indicate whether the cleavage is first carried out by an initiator (I) or executioner (E) caspase. Your answer would be a five-letter string composed of letters I and E only, e.g. EEEII.
( ) The initiator caspase-2
( ) The executioner caspase-3
( ) The BH3-only protein Bid
( ) The endonuclease inhibitor iCAD
( ) The nuclear protein Lamin A