818
A previously unrecognized element, located downstream of the start site of transcription in the first exon of the DR alpha gene , has been defined that enhances promoter activity up to eightfold in a position-dependent manner .
 ( DNA: DR alpha gene, None) , ( DNA: exon, None) , ( DNA: start site of transcription, 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: DR alpha gene, None) , ( DNA: exon, None) , ( DNA: start site of transcription, None) 