9439
Finally, although it has been reported that EBNA3C can upregulate CD21 in some B cells , we were unable to demonstrate any effect of EBNA3C on reporter plasmids which contain the CD21 promoter .
 B cells, CD21 promoter, CD21, EBNA3C, CD21, EBNA3C, reporter plasmids
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:
 B cells, CD21 promoter, CD21, EBNA3C, CD21, EBNA3C, reporter plasmids