4484
Granulocyte-macrophage colony-stimulating factor preferentially activates the 94-kD STAT5A and an 80-kD STAT5A isoform in human peripheral blood monocytes.
 ( protein: 94-kD STAT5A, None) , ( protein: 80-kD STAT5A isoform, None) , ( protein: Granulocyte-macrophage colony-stimulating factor, 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: 94-kD STAT5A, None) , ( protein: 80-kD STAT5A isoform, None) , ( protein: Granulocyte-macrophage colony-stimulating factor, None) 