5750
We also investigated the effects of stimulating T cell blasts with CD80 alone and found that there was a limited requirement for IL-2 in this system.
 ( protein: IL-2, None) , ( cell type: T cell blasts, None) , ( protein: CD80, 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-2, None) , ( cell type: T cell blasts, None) , ( protein: CD80, None) 