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In directing the synthesis of RNA through the intervening DNA and the gene by a tracking and transcription mechanism , the HS2 enhancer may (i) open up the chromatin structure of a gene domain and (ii) deliver enhancer binding proteins to the promoter sequence where they may stimulate the transcription of the gene at the cap site .
 DNA: enhancer; DNA: cap site; protein: enhancer binding proteins; RNA: RNA; DNA: DNA; DNA: HS2 enhancer; DNA: gene domain; DNA: chromatin structure
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: enhancer; DNA: cap site; protein: enhancer binding proteins; RNA: RNA; DNA: DNA; DNA: HS2 enhancer; DNA: gene domain; DNA: chromatin structure