6799
Peptidoglycan ( PGN ), the major cell wall component of Gram-positive bacteria , induces secretion of cytokines in macrophages through CD14 , the pattern recognition receptor that binds lipopolysaccharide and other microbial products .
 ( protein: cytokines, None) , ( protein: CD14, None) , ( cell type: macrophages, 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: cytokines, None) , ( protein: CD14, None) , ( cell type: macrophages, None) 