7777
We show, however, that the presence of CIITA does not affect the stability of the higher-order protein complex formed on DNA by RFX , X2BP and NF-Y .
 ( protein: X2BP, None) , ( protein: NF-Y, None) , ( protein: RFX, None) , ( protein: CIITA, 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: X2BP, None) , ( protein: NF-Y, None) , ( protein: RFX, None) , ( protein: CIITA, None) 