6649
In marked contrast to neutrophils and MO7e cells , GM-CSF did not induce tyrosine phosphorylation and activation of ERK in monocytes .
 ( protein: GM-CSF, None) , ( cell type: neutrophils, None) , ( protein: ERK, None) , ( cell type: monocytes, None) , ( cell type: MO7e 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: GM-CSF, None) , ( cell type: neutrophils, None) , ( protein: ERK, None) , ( cell type: monocytes, None) , ( cell type: MO7e cells, None) 