6300
Electrophoretic mobility gel shift assay also showed a reduction in the binding of a transcription factor to the MSR promoter AP-1/ets elements in IL-6 -treated cells.
 ( protein: transcription factor, None) , ( protein: IL-6, None) , ( DNA: MSR promoter AP-1/ets elements, None) , ( protein: MSR, None) , ( DNA: MSR promoter, 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: transcription factor, None) , ( protein: IL-6, None) , ( DNA: MSR promoter AP-1/ets elements, None) , ( protein: MSR, None) , ( DNA: MSR promoter, None) 