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NF-kappa B is composed of distinct subunits; five independent genes, NFKB1 ( p105 ), NFKB2 ( p100 ), RelA(p65) , c-rel and relB , that encode related proteins that bind to kappa B DNA elements have been isolated.
 kappa B DNA elements, NFKB1, p105, NF-kappa B, relB, RelA(p65), c-rel, NFKB2, p100
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 DNA elements, NFKB1, p105, NF-kappa B, relB, RelA(p65), c-rel, NFKB2, p100