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<p><b>Molecular machines</b> are a class of molecules typically described as an assembly of a discrete number of molecular components intended to produce mechanical movements in response to specific stimuli, mimicking <a href="page.php?w=macromolecule">macromolecular</a> devices such as switches and motors. Naturally occurring or biological molecular machines  are responsible for vital <a href="page.php?w=Biological_process">living process</a>es such as <a href="page.php?w=DNA_replication">DNA replication</a> and <a href="page.php?w=ATP_synthase">ATP synthesis</a>.</p><p>
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