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 .
 ( cell type: "physiologic" cell lineage, None) , ( cell type: T cells, None) , ( protein: MHC class II, 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:
 ( cell type: "physiologic" cell lineage, None) , ( cell type: T cells, None) , ( protein: MHC class II, None) 