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We have conducted functional studies of the enhancer elements of human T-cell leukemia virus type I ( HTLV-I ) using the human T-cell lines Jurkat and MOLT 4 , which are negative for HTLV-I , and MT-2 and TL-Mor , which carry the proviral genome of HTLV-I .
 DNA: enhancer elements; cell line: MOLT 4; cell line: human T-cell lines; cell line: Jurkat
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 elements; cell line: MOLT 4; cell line: human T-cell lines; cell line: Jurkat