720
The promoters were used without enhancers , or with enhancers derived from the beta-globin locus control region and the alpha-globin HS-40 enhancer .
 ( DNA: alpha-globin HS-40 enhancer, None) , ( DNA: enhancers, None) , ( DNA: beta-globin locus control region, None) , ( DNA: promoters, None) , ( DNA: enhancers, 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: alpha-globin HS-40 enhancer, None) , ( DNA: enhancers, None) , ( DNA: beta-globin locus control region, None) , ( DNA: promoters, None) , ( DNA: enhancers, None) 