4191
Comparison of the dose response to anti-CD3 stimulation demonstrated that half-maximal induction of IL-2 was achieved using the same dose of anti-CD3 for both freshly isolated and cultured T cells .
 ( protein: anti-CD3, None) , ( cell type: freshly isolated, None) , ( protein: anti-CD3, None) , ( protein: IL-2, None) , ( cell line: cultured 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:
 ( protein: anti-CD3, None) , ( cell type: freshly isolated, None) , ( protein: anti-CD3, None) , ( protein: IL-2, None) , ( cell line: cultured T cells, None) 