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We now demonstrate that nuclear expression of human c-Rel , which is induced by either phorbol ester or tumor necrosis factor alpha with delayed kinetics relative to p65 , markedly represses p65 -mediated activation of these transcription units.
 p65, c-Rel, tumor necrosis factor alpha, p65
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:
 p65, c-Rel, tumor necrosis factor alpha, p65