6484
IRF-1 is a transcription factor regulated by IFNs that is also essential for Th1 responses .
 ( cell type: Th1, None) , ( protein: transcription factor, None) , ( protein: IRF-1, None) , ( protein: IFNs, 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 type: Th1, None) , ( protein: transcription factor, None) , ( protein: IRF-1, None) , ( protein: IFNs, None) 