12034
Thus, the requirement for CD28 in IL-2 promoter activation appears to be due to RE/AP and not the NFAT or AP-1 sites .
 ( protein: CD28, None) , ( protein: RE/AP, None) , ( protein: IL-2, None) , ( DNA: IL-2 promoter, 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: CD28, None) , ( protein: RE/AP, None) , ( protein: IL-2, None) , ( DNA: IL-2 promoter, None) 