8515
The Oct2 transcription factor is expressed predominantly in B lymphocytes and plays an essential role during the terminal phase of B cell differentiation .
 ( cell type: lymphocytes, None) , ( protein: Oct2, None) , ( cell type: B lymphocytes, None) , ( protein: transcription factor, 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:
 ( cell type: lymphocytes, None) , ( protein: Oct2, None) , ( cell type: B lymphocytes, None) , ( protein: transcription factor, None) 