8542
To investigate the events involved in activation-induced Fas upregulation , we have examined mRNA accumulation , fas promoter activity , and protein expression in the Jurkat T-cell line treated with phorbol myristate acetate and ionomycin ( P/I ), pharmacological mimics of T-cell receptor activation .
 ( protein: Fas, None) , ( cell line: Jurkat T-cell line, None) , ( protein: T-cell receptor, 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: Fas, None) , ( cell line: Jurkat T-cell line, None) , ( protein: T-cell receptor, None) 