14689
We studied the functional interaction between human embryonic zeta 2 globin promoter and the alpha globin regulatory element ( HS-40 ) located 40 kb upstream of the zeta 2 globin gene .
 ( DNA: HS-40, None) , ( DNA: 40 kb upstream, None) , ( DNA: human embryonic zeta 2 globin promoter, None) , ( DNA: zeta 2 globin gene, None) , ( DNA: alpha globin regulatory element, 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: HS-40, None) , ( DNA: 40 kb upstream, None) , ( DNA: human embryonic zeta 2 globin promoter, None) , ( DNA: zeta 2 globin gene, None) , ( DNA: alpha globin regulatory element, None) 