4541
Together these results demonstrate that T cell expression of IL-3 is not specified by the activity of a single tissue-specific element , but instead involves multiple interacting elements that provide both specific positive regulation in T cells and specific negative regulation in fibroblasts .
 ( DNA: interacting elements, None) , ( cell type: T cells, None) , ( protein: IL-3, None) , ( cell type: fibroblasts, None) , ( DNA: tissue-specific element, 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: interacting elements, None) , ( cell type: T cells, None) , ( protein: IL-3, None) , ( cell type: fibroblasts, None) , ( DNA: tissue-specific element, None) 