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Regulation of transcription of the human erythropoietin receptor gene by proteins binding to GATA-1 and Sp1 motifs .
 ( DNA: GATA-1, None) , ( DNA: human erythropoietin receptor gene, None) , ( DNA: GATA-1 and Sp1 motifs, None) , ( DNA: Sp1 motifs, 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:
 ( DNA: GATA-1, None) , ( DNA: human erythropoietin receptor gene, None) , ( DNA: GATA-1 and Sp1 motifs, None) , ( DNA: Sp1 motifs, None) 