12415
Electromobility shift assay revealed that dexamethasone abolished the binding of nuclear transcription factors to the Ikaros binding site and reduced AP-1 binding activity .
 ( protein: nuclear transcription factors, None) , ( DNA: Ikaros binding site, None) , ( protein: AP-1, None) , ( protein: Ikaros, 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: nuclear transcription factors, None) , ( DNA: Ikaros binding site, None) , ( protein: AP-1, None) , ( protein: Ikaros, None) 