4113
We find that OCA-B binds DNA directly in the major groove between the two subdomains of the POU domain , requiring both an A at the fifth position of the octamer element and contact with the POU domain .
 ( DNA: fifth position, None) , ( DNA: POU domain, None) , ( DNA: POU domain, None) , ( protein: OCA-B, None) , ( DNA: major groove, None) , ( DNA: octamer element, 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: fifth position, None) , ( DNA: POU domain, None) , ( DNA: POU domain, None) , ( protein: OCA-B, None) , ( DNA: major groove, None) , ( DNA: octamer element, None) 