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We report here that Stat6 interacts with three binding sites in the human IL-4 promoter by electrophoretic mobility shift assays .
 ( DNA: human IL-4 promoter, None) , ( protein: Stat6, 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:
 ( DNA: human IL-4 promoter, None) , ( protein: Stat6, None) 