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. 2017 Jul 29;45(16):9611–9624. doi: 10.1093/nar/gkx649

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© The Author(s) 2017. Published by Oxford University Press on behalf of Nucleic Acids Research.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 7. — Bacillus anthracis GyrA^Ala-box gyrase acts as a canonical type II topoisomerase. (A) GyrA^Ala-box gyrase does not supercoil relaxed DNA. Relaxed (Rel) and negatively supercoiled [(−)SC] DNA standards are shown. (B) GyrA^Ala-box gyrase slowly relaxes (−)SC DNA. (C) GyrA^Ala-box gyrase slowly and distributively relaxes positively supercoiled [(+)SC] DNA. Gel images are representative of at least three independent experiments.