10775
T cell receptor (TCR) alpha and delta gene segments are organized within a single genetic locus but are differentially regulated during T cell development .
 T cell receptor (TCR) alpha
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:
 T cell receptor (TCR) alpha