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An additional significant finding was than TNF mRNA induced in primed cells was much more stable than in unprimed cells (T1/2 increased 6-8-fold).
 ( cell line: primed cells, None) , ( RNA: TNF mRNA, None) , ( protein: TNF, None) , ( cell line: unprimed cells, 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: primed cells, None) , ( RNA: TNF mRNA, None) , ( protein: TNF, None) , ( cell line: unprimed cells, None) 