10227
Bcl-2 protein inhibits bufalin -induced apoptosis through inhibition of mitogen-activated protein kinase activation in human leukemia U937 cells .
 ( cell line: human leukemia U937 cells, None) , ( protein: mitogen-activated protein kinase, None) , ( protein: Bcl-2 protein, 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:
 ( cell line: human leukemia U937 cells, None) , ( protein: mitogen-activated protein kinase, None) , ( protein: Bcl-2 protein, None) 