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<p>and <a href="page.php?w=germ_cell">germ cell</a>s have also been described as immortal.</p>

<p>Immortal cell lines of cancer cells can be created by induction of <a href="page.php?w=oncogenes">oncogenes</a> or loss of <a href="page.php?w=tumor_suppressor_gene">tumor suppressor gene</a>s. One way to induce immortality is through <a href="page.php?w=virus">viral</a>-mediated induction of the <a href="page.php?w=SV40_Large_T-antigen">large T-antigen</a>, commonly introduced through <a href="page.php?w=SV40">simian virus 40</a> (SV-40).</p>

<p><big>Organisms</big></p><p>
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