3361
The aim of this study was to determine whether NF-kappa B is related to a particular cell type and/or differentiation step during immunopoiesis .
 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:
 NF-kappa B