6392
Furthermore, our studies showed association of the IKK-alpha /beta heterodimer with NIK , IkappaB -alpha and -epsilon in unstimulated cells .
 ( protein: IKK-alpha, None) , ( protein: IkappaB, None) , ( protein: -epsilon, None) , ( protein: IKK-alpha /beta heterodimer, None) , ( protein: IkappaB -alpha, None) , ( cell type: unstimulated cells, None) , ( protein: NIK, 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: IKK-alpha, None) , ( protein: IkappaB, None) , ( protein: -epsilon, None) , ( protein: IKK-alpha /beta heterodimer, None) , ( protein: IkappaB -alpha, None) , ( cell type: unstimulated cells, None) , ( protein: NIK, None) 