14831
Because the GATA-1 gene is known to transactivate several genes specific for the erythroid , megakaryocytic , and mastocytic/basophilic lineages , we studied GATA-1 expression in these purified hematopoietic cells .
 ( protein: GATA-1, None) , ( DNA: GATA-1 gene, None) , ( cell type: hematopoietic 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:
 ( protein: GATA-1, None) , ( DNA: GATA-1 gene, None) , ( cell type: hematopoietic cells, None) 