1867
Function of NF-kappa B /Rel binding sites in the major histocompatibility complex class II invariant chain promoter is dependent on cell-specific binding of different NF-kappa B /Rel subunits .
 NF-kappa B /Rel subunits, NF-kappa B /Rel binding sites, major histocompatibility complex class II invariant chain promoter, 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:
 NF-kappa B /Rel subunits, NF-kappa B /Rel binding sites, major histocompatibility complex class II invariant chain promoter, NF-kappa B, NF-kappa B