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 .
 ( cell type: B cells, None) , ( DNA: CD21 promoter, None) , ( protein: CD21, None) , ( protein: EBNA3C, None) , ( protein: CD21, None) , ( protein: EBNA3C, None) , ( DNA: reporter plasmids, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell type: B cells, None) , ( DNA: CD21 promoter, None) , ( protein: CD21, None) , ( protein: EBNA3C, None) , ( protein: CD21, None) , ( protein: EBNA3C, None) , ( DNA: reporter plasmids, None) 