9946
The binding site for nuclear factor-kappaB ( NF-kappaB ) is present at the promoter region of the germline Cepsilon gene , but there is little information on whether this factor is involved in regulating IgE synthesis by human B cells .
 NF-kappaB, nuclear factor-kappaB, promoter region, IgE, human B cells, binding site, germline Cepsilon gene
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, nuclear factor-kappaB, promoter region, IgE, human B cells, binding site, germline Cepsilon gene