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Keywords:

  • catenanes;
  • DNA structures;
  • molecular devices;
  • nanostructures;
  • strand displacement
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Two-ring and three-ring DNA catenane systems undergo programmed and reversible dynamic transitions between predesigned topologies by a strand-displacement mechanism. In their Communication on page 2349 ff., I. Willner and co-workers outline how the catenated DNA nanostructures hold great promise as nanomachines for the dynamic, programmed transport and arrangement of cargoes at the nanoscale.