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is used by paleovirologists, though it fails to take into account confounding factors such as gene conversion and homologous recombination.

HIV-1

The HIV-1 LTR is 634 bp in length and, like other retroviral LTRs, is segmented into the U3, R, and U5 regions. U3 and U5 has been further subdivided according to transcription factor sites

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