7188
Although erythropoietin ( Epo ) is essential for the production of mature red blood cells , the cooperation with other factors is required for a proper balance between progenitor proliferation and differentiation .
 ( protein: erythropoietin, None) , ( cell type: mature red blood cells, None) , ( protein: Epo, 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: erythropoietin, None) , ( cell type: mature red blood cells, None) , ( protein: Epo, None) 