14691
Although sequences located between -559 and -88 of the zeta 2 globin gene were dispensable for its expression on enhancerless plasmids , they were required for the HS-40 enhancer -mediated activity of the zeta 2 globin promoter .
 ( DNA: zeta 2 globin promoter, None) , ( DNA: HS-40 enhancer, None) , ( DNA: enhancerless plasmids, None) , ( DNA: zeta 2 globin gene, None) , ( DNA: HS-40, 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: zeta 2 globin promoter, None) , ( DNA: HS-40 enhancer, None) , ( DNA: enhancerless plasmids, None) , ( DNA: zeta 2 globin gene, None) , ( DNA: HS-40, None) 