7298
In addition, we show that erythropoietin , which is also required for erythroid cell survival , cooperates with GATA-1 to stimulate bcl-xL gene expression and to maintain erythroid cell viability during terminal maturation .
 ( protein: GATA-1, None) , ( protein: bcl-xL, None) , ( protein: erythropoietin, 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: GATA-1, None) , ( protein: bcl-xL, None) , ( protein: erythropoietin, None) 