5333
Nuclear appearance of a factor that binds the CD28 response element within the interleukin-2 enhancer correlates with interleukin-2 production .
 ( DNA: CD28 response element, None) , ( DNA: interleukin-2 enhancer, None) , ( protein: interleukin-2, 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: CD28 response element, None) , ( DNA: interleukin-2 enhancer, None) , ( protein: interleukin-2, None) 