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. 2014 Jul 23;14(7):827–843. doi: 10.1586/14737159.2014.940319

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Figure 4. — Smart amplification process v.2. MutS goes over template DNA strand, and DNA polymerase drives the extension (on top). If MutS find a mismatch (black arrow), it is blocked and both MutS nether DNA polymerase are able to continue the process (bottom).