10229
Here, we report the effect of overexpression of bcl-2 in U937 cells on the signaling pathway of apoptosis that is induced by bufalin .
 ( protein: bcl-2, None) , ( cell line: U937 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: bcl-2, None) , ( cell line: U937 cells, None) 