2936
Overexpression of Bcl-2 in tumor cells blocks apoptosis induced by many stimuli, but inhibition of Fas -mediated killing has not been consistently observed.
 ( protein: Fas, None) , ( protein: Bcl-2, None) , ( cell type: tumor cells, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: Fas, None) , ( protein: Bcl-2, None) , ( cell type: tumor cells, None) 