2672
We then analyzed the expression of the master GATA1 gene , which encodes a finger transcription factor required for normal erythroid development; addition of RA to HPC stimulated into unilineage erythropoietic differentiation in liquid culture caused a virtually complete inhibition of GATA1 mRNA induction .
 ( protein: GATA1, None) , ( cell type: HPC, None) , ( DNA: master GATA1 gene, None) , ( protein: finger transcription factor, None) , ( RNA: GATA1 mRNA, 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: GATA1, None) , ( cell type: HPC, None) , ( DNA: master GATA1 gene, None) , ( protein: finger transcription factor, None) , ( RNA: GATA1 mRNA, None) 