6421
Here it is shown that microbial lipoproteins are potent stimulators of IL-12 production by human macrophages , and that induction is mediated by Toll-like receptors ( TLRs ).
 ( protein: microbial lipoproteins, None) , ( protein: IL-12, None) , ( protein: Toll-like receptors, None) , ( cell type: macrophages, None) , ( protein: TLRs, 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: microbial lipoproteins, None) , ( protein: IL-12, None) , ( protein: Toll-like receptors, None) , ( cell type: macrophages, None) , ( protein: TLRs, None) 