885
A similar potentiation of TNF effects was observed in Jurkat T cells and HeLa cells treated with soluble Tat protein .
 ( cell line: HeLa cells, None) , ( protein: TNF, None) , ( protein: Tat protein, 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 line: HeLa cells, None) , ( protein: TNF, None) , ( protein: Tat protein, None) 