4635
This cellular system offers the advantage that MHC class II induction is studied in a "physiologic" cell lineage that, as a result of this expression within the thymus , is thought to participate to the selection and maturation of the T cells .
 "physiologic" cell lineage, T cells, MHC class II
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:
 "physiologic" cell lineage, T cells, MHC class II