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Sequence variation in the long terminal repeat ( LTR ) region of HIV-1 was analyzed in viral isolates of 17 infected individuals .
 DNA: LTR; DNA: long terminal repeat ( LTR ) region
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: LTR; DNA: long terminal repeat ( LTR ) region