9617
Using in vivo footprinting we identified two sites in the promoter at -45 and -160 that were occupied only in CD20 + B cells.
 ( DNA: -45 and -160, 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:
 ( DNA: -45 and -160, None) , ( protein: CD20, None) 