14501
We conclude from these results that the functional activity of members of the rel family is regulated by their interaction with DNA and that Rel can be a potent transcriptional activator on specific kappa B sites .
 ( DNA: kappa B sites, None) , ( protein: rel family, None) , ( protein: Rel, 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:
 ( DNA: kappa B sites, None) , ( protein: rel family, None) , ( protein: Rel, None) 