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We have identified and separated four nuclear proteins from C81-66-45 cells, an HTLV-I immortalized Tax -expressing human T-lymphocyte line (Salahuddin et al., 1983), that interact with the TRE -DNA , none of which are identical with the Tax -protein .
 DNA: TRE; protein: Tax; protein: Tax -protein; protein: nuclear proteins; DNA: TRE -DNA; cell line: HTLV-I immortalized Tax -expressing human T-lymphocyte line; protein: Tax
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: TRE; protein: Tax; protein: Tax -protein; protein: nuclear proteins; DNA: TRE -DNA; cell line: HTLV-I immortalized Tax -expressing human T-lymphocyte line; protein: Tax