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In vivo transient transfection studies utilizing an OTF-2 expression vector resulted in similar findings: that OTF-2 protein enhanced DRA gene transcription , and that this effect requires an intact octamer element .
 DNA: DRA gene; protein: OTF-2; DNA: octamer element; protein: OTF-2 protein; protein: OTF-2; DNA: OTF-2 expression vector
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: DRA gene; protein: OTF-2; DNA: octamer element; protein: OTF-2 protein; protein: OTF-2; DNA: OTF-2 expression vector