11729
The role of cellular redox status in both cytotoxic activity and NF-kappa B activation in natural killer (NK) cells was investigated.
 natural killer (NK) cells, 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:
 natural killer (NK) cells, NF-kappa B