1875
Again, in vitro supershift studies indicate that the presence of p50 , p52 , p65 , and cRel correlates with positive function whereas the presence of only p50 and p52 correlates with negative function .
 ( protein: p50, None) , ( protein: p65, None) , ( protein: p52, None) , ( protein: p52, None) , ( protein: cRel, None) , ( protein: p50, 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: p50, None) , ( protein: p65, None) , ( protein: p52, None) , ( protein: p52, None) , ( protein: cRel, None) , ( protein: p50, None) 