4116
The recognition of both the POU domain and the octamer sequence by OCA-B provides a mechanism for differential regulation of octamer sites containing genes by the ubiquitous factor Oct-1 .
 ( protein: Oct-1, None) , ( protein: OCA-B, None) , ( DNA: octamer sequence, None) , ( DNA: octamer sites, None) , ( protein: ubiquitous factor, None) , ( DNA: POU domain, 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: Oct-1, None) , ( protein: OCA-B, None) , ( DNA: octamer sequence, None) , ( DNA: octamer sites, None) , ( protein: ubiquitous factor, None) , ( DNA: POU domain, None) 