8745
We also showed that tumor necrosis factor ( TNF ) and to a lesser extent interleukin-1 ( IL-1 ), secreted within the coculture, induce NF-kappaB activity and a correlative LTR transactivation .
 ( protein: TNF, None) , ( protein: NF-kappaB, None) , ( protein: tumor necrosis factor, None) , ( protein: IL-1, None) , ( protein: interleukin-1, None) , ( DNA: LTR, 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, None) , ( protein: NF-kappaB, None) , ( protein: tumor necrosis factor, None) , ( protein: IL-1, None) , ( protein: interleukin-1, None) , ( DNA: LTR, None) 