4555
Analyses of nuclear extracts by electrophoretic DNA mobility shift assays showed that decreased IL-2 production by stimulated T cells of elderly individuals was closely associated with impairments in the activation of both AP-1 and NF-AT .
 ( protein: NF-AT, None) , ( protein: AP-1, None) , ( cell type: stimulated T cells, None) , ( protein: IL-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:
 ( protein: NF-AT, None) , ( protein: AP-1, None) , ( cell type: stimulated T cells, None) , ( protein: IL-2, None) 