1537
C/EBP beta activated the TNF alpha gene promoter in cotransfection assays and bound to it at a site which failed to bind the closely related protein C/EBP alpha .
 ( protein: TNF alpha, None) , ( protein: C/EBP beta, None) , ( DNA: TNF alpha gene promoter, None) , ( protein: C/EBP alpha, 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: TNF alpha, None) , ( protein: C/EBP beta, None) , ( DNA: TNF alpha gene promoter, None) , ( protein: C/EBP alpha, None) 