3286
Transient expression assays with plasmids containing deleted parts of the LTR region linked to a reporter gene showed that the NF-kappaB binding site was essential for HIV-1 LTR activity in CD40-stimulated B lymphocytes .
 CD40-stimulated B lymphocytes, NF-kappaB, LTR region, HIV-1 LTR, NF-kappaB binding 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:
 CD40-stimulated B lymphocytes, NF-kappaB, LTR region, HIV-1 LTR, NF-kappaB binding site