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The c-rel protooncogene product represses NF-kappa B p65 -mediated transcriptional activation of the long terminal repeat of type 1 human immunodeficiency virus .
 c-rel protooncogene product, NF-kappa B, p65, c-rel protooncogene
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:
 c-rel protooncogene product, NF-kappa B, p65, c-rel protooncogene