3816
This activation differed substantially from that mediated by phorbol 12-myristate 13-acetate ( PMA ) and Ca2+ ionophore or produced by costimulation with antibodies against the T cell receptor-CD3 complex and to CD28 .
 ( protein: CD28, None) , ( protein: T cell receptor-CD3 complex, None) , ( protein: antibodies, 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: T cell receptor-CD3 complex, None) , ( protein: antibodies, None) 