2636
Nuclei from GATA-1 -mutant embryonic stem cells can still be reprogrammed to express their globin genes in erythroid heterokaryons , indicating that de novo induction of GATA-1 is not required for globin gene activation following cell fusion .
 ( cell line: GATA-1 -mutant embryonic stem cells, None) , ( cell type: erythroid heterokaryons, None) , ( cell type: embryonic stem cells, None) , ( DNA: globin genes, None) , ( protein: GATA-1, None) , ( protein: GATA-1, None) , ( DNA: globin 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:
 ( cell line: GATA-1 -mutant embryonic stem cells, None) , ( cell type: erythroid heterokaryons, None) , ( cell type: embryonic stem cells, None) , ( DNA: globin genes, None) , ( protein: GATA-1, None) , ( protein: GATA-1, None) , ( DNA: globin gene, None) 