1747
These binding sites have similar sequences and multiple copies of the binding sites confer tissue-specific down-regulation when attached to a minimal lox promoter fragment .
 DNA: binding sites; DNA: minimal lox promoter fragment; DNA: lox promoter
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 DNA: binding sites; DNA: minimal lox promoter fragment; DNA: lox promoter