4552
Although transcriptional factors AP-1 and nuclear factor of activated T cells ( NF-AT ) are important for the normal induction of IL-2 , it is unknown if the age-related decline in IL-2 production by activated human T cells may be associated with aberrancies in transcriptional regulatory proteins .
 ( protein: IL-2, None) , ( protein: NF-AT, None) , ( protein: AP-1, None) , ( cell type: human T cells, None) , ( protein: IL-2, None) , ( protein: transcriptional factors, None) , ( protein: transcriptional regulatory proteins, 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: IL-2, None) , ( protein: NF-AT, None) , ( protein: AP-1, None) , ( cell type: human T cells, None) , ( protein: IL-2, None) , ( protein: transcriptional factors, None) , ( protein: transcriptional regulatory proteins, None) 