14295
It is most likely that the presence of a silencer contributes to the more stringent activation requirements of naive CD4+ T cells .
 ( cell type: naive CD4+ T cells, None) , ( DNA: silencer, 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:
 ( cell type: naive CD4+ T cells, None) , ( DNA: silencer, None) 