1236
The activation of nuclear factor kappa B ( NF-kappa B ) in intact cells is mechanistically not well understood.
 nuclear factor kappa B, 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:
 nuclear factor kappa B, NF-kappa B