3287
In addition, electrophoretic mobility shift and supershift assays revealed that important NF-kappaB binding activity composed of at least p50 , p65 , and c-Rel NF-kappaB subunits was present in nuclei of CD40-stimulated B cells .
 ( protein: p50, None) , ( protein: NF-kappaB, None) , ( protein: c-Rel, None) , ( protein: NF-kappaB subunits, None) , ( cell line: CD40-stimulated B cells, None) , ( protein: p65, 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: p50, None) , ( protein: NF-kappaB, None) , ( protein: c-Rel, None) , ( protein: NF-kappaB subunits, None) , ( cell line: CD40-stimulated B cells, None) , ( protein: p65, None) , ( protein: NF-kappaB, None) 