11246
Furthermore, the nuclear protein complexes binding the SRE motif induced in activated T cells of young and elderly subjects contained serum response factor and Elk-1 pointing toward age-related defects in the activation of transcriptional regulatory proteins distinct from c-jun/ AP-1 .
 ( protein: c-jun/ AP-1, None) , ( protein: serum response factor, None) , ( protein: nuclear protein complexes, None) , ( protein: Elk-1, None) , ( cell type: activated T cells, None) , ( DNA: SRE motif, None) , ( protein: AP-1, None) , ( DNA: SRE, 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: c-jun/ AP-1, None) , ( protein: serum response factor, None) , ( protein: nuclear protein complexes, None) , ( protein: Elk-1, None) , ( cell type: activated T cells, None) , ( DNA: SRE motif, None) , ( protein: AP-1, None) , ( DNA: SRE, None) , ( protein: transcriptional regulatory proteins, None) 