4649
There are four putative NF-kappa B binding sites ( kappa B-1 , kappa B-2 , kappa B-3 , kappa B-4 ) in human TNF-alpha promoter .
 kappa B-2, NF-kappa B, human TNF-alpha, kappa B-1, human TNF-alpha promoter, NF-kappa B binding sites, kappa B-4, kappa B-3
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:
 kappa B-2, NF-kappa B, human TNF-alpha, kappa B-1, human TNF-alpha promoter, NF-kappa B binding sites, kappa B-4, kappa B-3