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5. One of the signaling molecules which mediates programmed cell death is nuclear factor Kappa-B ( NF-kappa B ).
 nuclear factor Kappa-B, signaling molecules, 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, signaling molecules, NF-kappa B