7015
PML mRNA and protein , while barely detectable in quiescent HPCs , are consistently induced by growth factor stimulation through the erythroid or granulocytic lineage .
 ( cell type: HPCs, None) , ( RNA: PML mRNA, None) , ( protein: protein, None) , ( protein: growth 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:
 ( cell type: HPCs, None) , ( RNA: PML mRNA, None) , ( protein: protein, None) , ( protein: growth factor, None) 