pmc-status-qastatus 0 pmc-status-live yes pmc-status-embargo no pmc-status-released yes pmc-prop-open-access yes pmc-prop-olf no pmc-prop-manuscript no pmc-prop-legally-suppressed no pmc-prop-has-pdf yes pmc-prop-has-supplement yes pmc-prop-pdf-only no pmc-prop-suppress-copyright no pmc-prop-is-real-version no pmc-prop-is-scanned-article no pmc-prop-preprint no pmc-prop-in-epmc yes pmc-license-ref CC BY cover-date 15 December 2015 INTRODUCTION The level of DNA supercoiling can have highly significant implications for vital cellular processes, and topoisomerases are therefore required in every organism to prevent accumulation of excessive supercoiling ( 1 ).
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Structural basis for suppression of hypernegative DNA supercoiling by E. coli topoisomerase I.
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