820
Significant sequence homology of this element was found in the DNA of the DR beta , DP alpha and -beta , and DQ alpha genes , always located downstream of the transcriptional start site .
 ( DNA: transcriptional start site, None) , ( DNA: 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: transcriptional start site, None) , ( DNA: element, None) 