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To determine the role of AP-2 in the regulation of the HTLV-I LTR gene expression , we used an AP-2 cDNA in DNA binding and transient expression assays .
 DNA: AP-2 cDNA; protein: AP-2; protein: AP-2; DNA: HTLV-I LTR
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: AP-2 cDNA; protein: AP-2; protein: AP-2; DNA: HTLV-I LTR