4637
Furthermore, the anatomy of interaction between the MHC class II DRA promoter and corresponding binding factors was analyzed by in vivo DNAse I footprint .
 ( protein: binding factors, None) , ( protein: DNAse I, None) , ( DNA: MHC class II DRA promoter, 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: binding factors, None) , ( protein: DNAse I, None) , ( DNA: MHC class II DRA promoter, None) 