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. 2010 Sep 27;5(9):e13033. doi: 10.1371/journal.pone.0013033

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Bruant et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A) Isolation of plasmid p19 from strain P7^T by standard cesium chloride gradient. Visualization of the two bands of DNA with UV illumination. Arrow indicate the lower band which contains the closed circular plasmid DNA. B) Digestion of the plasmid DNA by EcoRI. 1 kb ladder was used. Sizes are indicated on the left (ladder) and on the right (plasmid DNA).