13476
Fusion of the upstream portion of the delta promoter to the truncated beta globin promoter yielded a modest increase in promoter strength relative to the truncated beta gene promoter , indicating the presence of a positive transcriptional element (s) in the upstream delta globin regulatory region .
 ( DNA: upstream delta globin regulatory region, None) , ( DNA: upstream portion, None) , ( DNA: truncated beta gene promoter, None) , ( DNA: positive transcriptional element, None) , ( DNA: beta globin promoter, None) , ( DNA: delta promoter, 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: upstream delta globin regulatory region, None) , ( DNA: upstream portion, None) , ( DNA: truncated beta gene promoter, None) , ( DNA: positive transcriptional element, None) , ( DNA: beta globin promoter, None) , ( DNA: delta promoter, None) 