10231
No significant difference was detected in the activation of MAPK kinase-1 that is induced by bufalin in wild-type or Bcl-2-overexpressed U937 cells ; however, the activation of MAPK by bufalin was significantly attenuated in the cells overexpressing Bcl-2 .
 ( protein: MAPK, None) , ( protein: MAPK, None) , ( protein: MAPK kinase-1, None) , ( protein: Bcl-2, None) , ( cell type: Bcl-2-overexpressed U937 cells, 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: MAPK, None) , ( protein: MAPK, None) , ( protein: MAPK kinase-1, None) , ( protein: Bcl-2, None) , ( cell type: Bcl-2-overexpressed U937 cells, None) , ( cell line: U937 cells, None) 