520
The specificity of CIITA for three major MHC class II genes , DR , DQ and DP , is mediated by its remaining C-terminal residues ( amino acids 317-1130 ).
 ( DNA: MHC class II genes, None) , ( protein: CIITA, None) , ( protein: amino acids 317-1130, None) , ( protein: C-terminal residues, None) , ( protein: MHC class II, None) , ( DNA: DP, None) , ( DNA: DQ, None) , ( DNA: DR, 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:
 ( DNA: MHC class II genes, None) , ( protein: CIITA, None) , ( protein: amino acids 317-1130, None) , ( protein: C-terminal residues, None) , ( protein: MHC class II, None) , ( DNA: DP, None) , ( DNA: DQ, None) , ( DNA: DR, None) 