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Tax acts indirectly by inducing or modifying the action of various host transcription factors , including members of the NF-kappa B /Rel family of enhancer-binding proteins .
 NF-kappa B /Rel family, enhancer-binding proteins, transcription factors, 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:
 NF-kappa B /Rel family, enhancer-binding proteins, transcription factors, NF-kappa B