8670
However, we show that JunB binds directly to the P1 site and synergizes with c-Maf to activate an IL-4 luciferase reporter gene .
 JunB, c-Maf, IL-4 luciferase reporter gene, IL-4, P1 site
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:
 JunB, c-Maf, IL-4 luciferase reporter gene, IL-4, P1 site