8554
Heterokaryons formed by the fusion of anergic murine T cells to normal murine T cells also failed to accumulate intracellular IL-2 protein in response to stimulation either with the combination of CD3 and CD28 mAbs or with ionomycin plus a protein kinase C -activating phorbol ester .
 ( cell type: anergic murine T cells, None) , ( protein: intracellular IL-2 protein, None) , ( protein: CD3, None) , ( cell line: Heterokaryons, None) , ( cell type: normal murine T cells, None) , ( protein: CD28 mAbs, None) , ( protein: protein kinase C, 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:
 ( cell type: anergic murine T cells, None) , ( protein: intracellular IL-2 protein, None) , ( protein: CD3, None) , ( cell line: Heterokaryons, None) , ( cell type: normal murine T cells, None) , ( protein: CD28 mAbs, None) , ( protein: protein kinase C, None) 