57
Next is presented a discussion of the use of embryonic stem cells in the analysis of hematopoietic gene expression and the use of targeted gene disruption to analyze the role of transcription factors in hematopoiesis .
 ( cell type: embryonic stem cells, None) , ( protein: transcription factors, None) , ( DNA: hematopoietic 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 type: embryonic stem cells, None) , ( protein: transcription factors, None) , ( DNA: hematopoietic gene, None) 