500
We, therefore, compared the activation state of the IL-2 gene promoter region in freshly isolated and stimulated Ipr CD4-8- T cells with that of normal T lymphocytes .
 ( DNA: IL-2 gene promoter region, None) , ( protein: IL-2, None) , ( cell line: Ipr CD4-8- T cells, None) , ( cell type: normal T lymphocytes, None) , ( cell type: T cells, 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: IL-2 gene promoter region, None) , ( protein: IL-2, None) , ( cell line: Ipr CD4-8- T cells, None) , ( cell type: normal T lymphocytes, None) , ( cell type: T cells, None) 