778
Coexpression of HMG I/Y and Oct-2 in cell lines lacking Oct-2 results in high levels of HLA-DRA gene expression , and in vitro DNA-binding studies reveal that HMG I/Y stimulates Oct-2A binding to the HLA-DRA promoter .
 ( protein: Oct-2A, None) , ( protein: Oct-2, None) , ( DNA: HLA-DRA promoter, None) , ( protein: I/Y, None) , ( protein: I/Y, None) , ( DNA: HLA-DRA gene, None) , ( protein: HMG I/Y, None) , ( cell line: cell lines, None) , ( protein: Oct-2, 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-2A, None) , ( protein: Oct-2, None) , ( DNA: HLA-DRA promoter, None) , ( protein: I/Y, None) , ( protein: I/Y, None) , ( DNA: HLA-DRA gene, None) , ( protein: HMG I/Y, None) , ( cell line: cell lines, None) , ( protein: Oct-2, None) 