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; DNA: element
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
 Entities: transcriptional start site, element 
Answer:
 DNA: transcriptional start site; DNA: element