14422
These observations suggest a second pathway leading to NF-kappa B induction , in which processing of the precursors rather than phosphorylation of I kappa B plays a major role.
 I 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:
 I kappa B, NF-kappa B