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In transfection assays , the human GM-CSF element has a strong positive effect on the expression of a reporter gene by the human T cell line Jurkat J6 upon stimulation .
 ( cell line: Jurkat J6, None) , ( DNA: human GM-CSF element, None) , ( protein: GM-CSF, None) , ( cell line: human T cell line, None) , ( DNA: reporter gene, 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:
 ( cell line: Jurkat J6, None) , ( DNA: human GM-CSF element, None) , ( protein: GM-CSF, None) , ( cell line: human T cell line, None) , ( DNA: reporter gene, None) 