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. 2017 Aug 22;7:9073. doi: 10.1038/s41598-017-08290-6

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Different examples of how immobilized DNA might enter the nanopore. (a) An example of when a tightly folded DNA enters the nanopore and the DNA is subsequently pulled out. (b) An example of when a less-folded DNA enters the nanopore and the DNA is subsequently pulled out. (c) An example of the situation that occurs when the nanopore is not aligned to the point at which DNA is attached to the probe.