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Cotransfection of JAK3 with IL-4 Stat into COS-7 cells produced an intracellular activity which bound the same IFN-gamma activation site-like sequence and comigrated with IL-4 NAF in electrophoretic mobility shift assay .
 ( protein: IL-4, None) , ( protein: IL-4 Stat, None) , ( cell line: COS-7 cells, None) , ( protein: IL-4 NAF, None) , ( protein: IL-4, None) , ( protein: JAK3, None) , ( DNA: IFN-gamma activation site-like sequence, 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: IL-4, None) , ( protein: IL-4 Stat, None) , ( cell line: COS-7 cells, None) , ( protein: IL-4 NAF, None) , ( protein: IL-4, None) , ( protein: JAK3, None) , ( DNA: IFN-gamma activation site-like sequence, None) 