7437
Reciprocally, inhibition of NF-kappaB activation by a soluble peptide inhibitor or a dominant form of the NF-kappaB inhibitor , IkappaB , makes the cells more susceptible to Fas-mediated apoptosis .
 NF-kappaB, IkappaB, NF-kappaB
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:
 NF-kappaB, IkappaB, NF-kappaB