5J5Q:
reference: Trapping of the transport-segment DNA by the ATPase domains of a type II topoisomerase., Laponogov I, Pan XS, Veselkov DA, Skamrova GB, Umrekar TR, Fisher LM, Sanderson MR, Nat Commun. 2018 Jul 3;9(1):2579. doi: 10.1038/s41467-018-05005-x. PMID: 29968711

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