621
It seems that the rearrangement of the TCR gamma loci in the gamma delta lineage may not always take place at a developmental stage strictly equivalent to the rearrangement of TCR beta in the alpha beta lineage , and it is not clear just how early the two lineages diverge.
 DNA: TCR gamma loci; cell type: alpha beta lineage; cell type: gamma delta lineage; DNA: TCR beta
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: TCR gamma loci; cell type: alpha beta lineage; cell type: gamma delta lineage; DNA: TCR beta