8682
The finding of Tax mutants segregating these two pathways suggested that the NF-kappaB pathway was essential for IL-2 -independent growth of CTLL-2 cells while the CRE pathway was unnecessary.
 ( protein: IL-2, None) , ( protein: NF-kappaB, None) , ( DNA: CRE, None) , ( protein: Tax, None) , ( cell type: CTLL-2 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: IL-2, None) , ( protein: NF-kappaB, None) , ( DNA: CRE, None) , ( protein: Tax, None) , ( cell type: CTLL-2 cells, None) 