Caspase cleaved BID targets mitochondria and is required for cytochrome c release, while BCL-XL prevents this release but not tumor necrosis factor-R1/Fas death - Gross,A.; Yin,X.M.; Wang,K.; Wei,M.C.; Jockel,J.; Milliman,C.; Erdjument-Bromage,H.; Tempst,P.; Korsmeryer,S.J. (J Biol Chem, 1999)