4186
The integrin alpha 4 beta 1 can provide a costimulus to induce IL-2 secretion and IL-2R expression leading to enhanced proliferation of purified, peripheral blood T cells .
 ( protein: IL-2R, None) , ( protein: integrin alpha 4 beta 1, None) , ( cell type: peripheral blood T cells, None) , ( protein: IL-2, 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: IL-2R, None) , ( protein: integrin alpha 4 beta 1, None) , ( cell type: peripheral blood T cells, None) , ( protein: IL-2, None) 