11632
Differential presentation of peptide by HLA DQ2 heterodimers varying at the DQA1 locus may have relevance to host defense and the pathogenesis of HLA DQ2 -associated autoimmune diseases .
 ( protein: DQ2, None) , ( protein: HLA DQ2 heterodimers, None) , ( DNA: DQA1 locus, 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:
 ( protein: DQ2, None) , ( protein: HLA DQ2 heterodimers, None) , ( DNA: DQA1 locus, None) 