9857
Thus, it is not unexpected that this versatile cellular homeostatic switch would be affected by a variety of viral pathogens, which have evolved mechanisms to utilize various aspects of Rel /NF-kappa B activity to facilitate their replication, cell survival and possibly evasion of immune responses .
 Rel, Rel /NF-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:
 Rel, Rel /NF-kappa B, /NF-kappa B