14660
When stably introduced into primary erythroblasts or conditionally transformed erythroid progenitors cells , exogenous GATA-2/ER promoted proliferation and inhibited terminal differentiation in an estrogen -dependent manner .
 ( cell type: primary erythroblasts, None) , ( protein: GATA-2/ER, None) , ( cell line: conditionally transformed erythroid progenitors 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:
 ( cell type: primary erythroblasts, None) , ( protein: GATA-2/ER, None) , ( cell line: conditionally transformed erythroid progenitors cells, None) 