9620
The composite PU.1 and Pip site likely accounts for both lineage and stage -specific expression of CD20 whereas the CD20 E box binding proteins enhance overall promoter activity and may link the promoter to a distant enhancer .
 ( protein: CD20 E box binding proteins, None) , ( DNA: composite PU.1 and Pip site, None) , ( protein: CD20, None) , ( DNA: distant enhancer, None) , ( DNA: E box, None) , ( protein: CD20, 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:
 ( protein: CD20 E box binding proteins, None) , ( DNA: composite PU.1 and Pip site, None) , ( protein: CD20, None) , ( DNA: distant enhancer, None) , ( DNA: E box, None) , ( protein: CD20, None) 