10774
An enhancer-blocking element between alpha and delta gene segments within the human T cell receptor alpha/delta locus .
 ( DNA: enhancer-blocking element, None) , ( DNA: human T cell receptor alpha/delta locus, 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:
 ( DNA: enhancer-blocking element, None) , ( DNA: human T cell receptor alpha/delta locus, None) 