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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 .
 p50, NF-kappaB, c-Rel, NF-kappaB subunits, CD40-stimulated B cells, p65, NF-kappaB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 p50, NF-kappaB, c-Rel, NF-kappaB subunits, CD40-stimulated B cells, p65, NF-kappaB