7297
Consistent with a role for bcl-xL in mediating GATA-1 -induced erythroid cell survival , in vitro-differentiated bcl-xL -/- embryonic stem cells fail to generate viable mature definitive erythroid cells , a phenotype resembling that of GATA-1 gene disruption .
 ( protein: bcl-xL, None) , ( cell type: erythroid cells, None) , ( cell line: vitro-differentiated bcl-xL -/- embryonic stem cells, None) , ( protein: bcl-xL, None) , ( protein: GATA-1, None) , ( DNA: GATA-1 gene, 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: bcl-xL, None) , ( cell type: erythroid cells, None) , ( cell line: vitro-differentiated bcl-xL -/- embryonic stem cells, None) , ( protein: bcl-xL, None) , ( protein: GATA-1, None) , ( DNA: GATA-1 gene, None) 