8300
To test this apparent discrepancy, we realized that HTB and triflusal (but neither aspirin nor salicylate ) produced a concentration-dependent inhibition of COX-2 protein expression in peripheral human mononuclear cells .
 ( protein: COX-2, None) , ( cell type: peripheral human mononuclear 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:
 ( protein: COX-2, None) , ( cell type: peripheral human mononuclear cells, None) 