10809
Recent studies suggest that the CD28 response element ( CD28RE ) does not function independently but works instead in conjunction with the adjacent promoter proximal AP-1 -binding site and this hypothesis is confirmed here.
 ( protein: CD28, None) , ( DNA: AP-1 -binding site, None) , ( DNA: CD28 response element, None) , ( DNA: adjacent promoter proximal AP-1 -binding site, None) , ( DNA: CD28RE, None) , ( protein: AP-1, 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) , ( DNA: AP-1 -binding site, None) , ( DNA: CD28 response element, None) , ( DNA: adjacent promoter proximal AP-1 -binding site, None) , ( DNA: CD28RE, None) , ( protein: AP-1, None) 