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Costimulatory signals, such as activation of the CD28 cell surface molecule on T cells , lead to activation through a distinct region of the granulocyte-macrophage colony-stimulating factor ( GM-CSF ) promoter .
 ( cell type: T cells, None) , ( protein: GM-CSF, None) , ( DNA: granulocyte-macrophage colony-stimulating factor ( GM-CSF ) promoter, None) , ( protein: CD28 cell surface molecule, None) , ( protein: granulocyte-macrophage colony-stimulating factor, 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 type: T cells, None) , ( protein: GM-CSF, None) , ( DNA: granulocyte-macrophage colony-stimulating factor ( GM-CSF ) promoter, None) , ( protein: CD28 cell surface molecule, None) , ( protein: granulocyte-macrophage colony-stimulating factor, None) 