4686
A complementary single-residue substitution in the peptide abolished its binding to DQ3.2 and converted it to a peptide that can bind to DQ3.1 and DQ3.3 Asp -57-positive MHC molecules .
 ( protein: DQ3.3 Asp -57-positive MHC molecules, 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: DQ3.3 Asp -57-positive MHC molecules, None) 