4112
B-cell-specific transcription of immunoglobulin genes is mediated by the interaction of a POU domain containing transcription factor Oct-1 or Oct-2 , with the B-cell-specific coactivator OCA-B ( Bob-1 , OBF-1 ) and a prototype octamer element .
 ( protein: Oct-2, None) , ( protein: B-cell-specific coactivator, None) , ( DNA: immunoglobulin genes, None) , ( protein: OBF-1, None) , ( DNA: prototype octamer element, None) , ( protein: Oct-1, None) , ( DNA: POU domain, None) , ( protein: Bob-1, None) , ( protein: transcription factor, None) , ( protein: OCA-B, 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-2, None) , ( protein: B-cell-specific coactivator, None) , ( DNA: immunoglobulin genes, None) , ( protein: OBF-1, None) , ( DNA: prototype octamer element, None) , ( protein: Oct-1, None) , ( DNA: POU domain, None) , ( protein: Bob-1, None) , ( protein: transcription factor, None) , ( protein: OCA-B, None) 