779
Thus, Oct-2A and HMG I/Y may synergize to activate HLA-DRA expression in B cells .
 ( cell type: B cells, None) , ( protein: HMG I/Y, None) , ( protein: Oct-2A, None) , ( DNA: HLA-DRA, None) , ( protein: I/Y, 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: B cells, None) , ( protein: HMG I/Y, None) , ( protein: Oct-2A, None) , ( DNA: HLA-DRA, None) , ( protein: I/Y, None) 