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Super-shift analysis revealed that the NF-kappa B complex of costimulated CD4+ T cells contained large amounts of p50 , substantial amounts of p65 , and marginal levels of c-Rel proteins .
 costimulated CD4+ T cells, c-Rel proteins, NF-kappa B complex, p50, CD4+ T cells, p65, NF-kappa B
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:
 costimulated CD4+ T cells, c-Rel proteins, NF-kappa B complex, p50, CD4+ T cells, p65, NF-kappa B