5820
This NF-kappaB -like element was able to form a complex with NF-kappaB family proteins in vitro.
 ( protein: NF-kappaB, None) , ( DNA: NF-kappaB -like element, None) , ( protein: NF-kappaB family proteins, None) , ( protein: NF-kappaB, 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: NF-kappaB, None) , ( DNA: NF-kappaB -like element, None) , ( protein: NF-kappaB family proteins, None) , ( protein: NF-kappaB, None) 