2673
These results indicate that RA directly inhibits the erythroid differentiation program at the level of early adult HPC , and may lead to a shift from the erythroid to granulocytic differentiation pathway .
 ( cell type: HPC, 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: HPC, None) 