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<p>DNA) with full LTRs.  The LTRs then mediate integration of the DNA via an LTR specific <a href="page.php?w=integrase">integrase</a> into another region of the host <a href="page.php?w=chromosome">chromosome</a>. </p>

<p>Retroviruses such as human immunodeficiency virus (<a href="page.php?w=HIV">HIV</a>) use this basic mechanism.</p>

<p><big>Dating retroviral insertions</big></p>
<p>As 5' and 3' LTRs are identical upon insertion, the difference between paired LTRs can be used to estimate the age of ancient retroviral insertions. This method of dating</p><p>
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