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Here we show that the lymphoid-specific transcription factor Oct-2A plays a critical role in HLA-DRA gene expression in class II-positive B cell lines , and that the high mobility group protein ( HMG ) I/Y binds to multiple sites within the DRA promoter , including the Oct-2A binding site .
 ( protein: lymphoid-specific transcription factor, None) , ( protein: high mobility group protein, None) , ( DNA: HLA-DRA gene, None) , ( protein: Oct-2A, None) , ( DNA: Oct-2A binding site, None) , ( DNA: DRA promoter, None) , ( protein: lymphoid-specific transcription factor Oct-2A, None) , ( protein: HMG, None) , ( protein: Oct-2A, None) , ( protein: I/Y, None) , ( cell line: class II-positive B cell lines, 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: lymphoid-specific transcription factor, None) , ( protein: high mobility group protein, None) , ( DNA: HLA-DRA gene, None) , ( protein: Oct-2A, None) , ( DNA: Oct-2A binding site, None) , ( DNA: DRA promoter, None) , ( protein: lymphoid-specific transcription factor Oct-2A, None) , ( protein: HMG, None) , ( protein: Oct-2A, None) , ( protein: I/Y, None) , ( cell line: class II-positive B cell lines, None) 