10774
An enhancer-blocking element between alpha and delta gene segments within the human T cell receptor alpha/delta locus .
 enhancer-blocking element, human T cell receptor alpha/delta locus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 enhancer-blocking element, human T cell receptor alpha/delta locus