4724
Within this region, an NF-kappaB site at -59 to -50 and its adjacent 20-base pair upstream sequence were demonstrated to play a critical role for the IL-9 promoter activity .
 IL-9, NF-kappaB site, -59 to -50, 20-base pair upstream sequence, IL-9 promoter, NF-kappaB
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:
 IL-9, NF-kappaB site, -59 to -50, 20-base pair upstream sequence, IL-9 promoter, NF-kappaB