13036
We analysed IL-2 production in purified neonatal and adult T cells using polyclonal activator phorbol ester + calcium ionophore ( PDBu + iono ) or receptor-mediated anti-CD3 /anti-CD3+ anti-CD28 stimulation .
 ( protein: anti-CD3, None) , ( protein: anti-CD28, 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: anti-CD3, None) , ( protein: anti-CD28, None) , ( protein: IL-2, None) 