8605
DOR1 ligation by a specific DOR1 agonist , deltorphin , augmented IL-2 secretion by synergizing with signals from TCR- CD3 and CD28 .
 ( protein: CD28, None) , ( protein: TCR- CD3, None) , ( protein: DOR1, None) , ( protein: IL-2, None) , ( protein: DOR1, None) , ( protein: CD3, 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: CD28, None) , ( protein: TCR- CD3, None) , ( protein: DOR1, None) , ( protein: IL-2, None) , ( protein: DOR1, None) , ( protein: CD3, None) 