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<h2 class="hd hd-2 unit-title">Antibody Structure</h2>
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<h2 class="hd hd-2 unit-title">A Gentle Introduction to the Immune System</h2>
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<h2 class="hd hd-2 unit-title">Generation of Antibody Diversity</h2>
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Your browser does not support this video format. Try using a different browser.
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<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
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