713
PU.1 is expressed at highest levels in mature human monocytes and human peripheral blood neutrophils .
 ( cell type: human peripheral blood neutrophils, None) , ( cell type: mature human monocytes, None) , ( cell type: monocytes, None) , ( protein: PU.1, None) , ( cell type: neutrophils, 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 type: human peripheral blood neutrophils, None) , ( cell type: mature human monocytes, None) , ( cell type: monocytes, None) , ( protein: PU.1, None) , ( cell type: neutrophils, None) 