3448
The interleukin-2 ( IL-2 ) promoter consists of several independent T cell receptor ( TcR ) responsive elements .
 ( protein: TcR, None) , ( protein: IL-2, None) , ( protein: T cell receptor, None) , ( DNA: T cell receptor ( TcR ) responsive elements, None) , ( protein: interleukin-2, None) , ( DNA: interleukin-2 ( 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: TcR, None) , ( protein: IL-2, None) , ( protein: T cell receptor, None) , ( DNA: T cell receptor ( TcR ) responsive elements, None) , ( protein: interleukin-2, None) , ( DNA: interleukin-2 ( IL-2 ) promoter, None) 