4551
Age-related decreases in IL-2 production by human T cells are associated with impaired activation of nuclear transcriptional factors AP-1 and NF-AT .
 ( protein: NF-AT, None) , ( protein: AP-1, None) , ( protein: transcriptional factors, None) , ( protein: IL-2, None) , ( protein: nuclear transcriptional factors, None) , ( cell type: human T cells, 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: NF-AT, None) , ( protein: AP-1, None) , ( protein: transcriptional factors, None) , ( protein: IL-2, None) , ( protein: nuclear transcriptional factors, None) , ( cell type: human T cells, None) 