13782
Molecular dissection of the B-cell-specific transcription coactivator OCA-B has revealed distinct regions important, respectively, for recruitment to immunoglobulin promoters through interaction with octamer-bound Oct-1 and for subsequent coactivator function.
 ( protein: OCA-B, None) , ( protein: octamer-bound Oct-1, None) , ( DNA: immunoglobulin promoters, None) , ( protein: Oct-1, 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: OCA-B, None) , ( protein: octamer-bound Oct-1, None) , ( DNA: immunoglobulin promoters, None) , ( protein: Oct-1, None) 