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. 2021 Jan 21;49(3):1426–1435. doi: 10.1093/nar/gkaa1258

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© The Author(s) 2021. 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/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Graphical Abstract — A schematic diagram depicting the homologous recombination reaction scheme within the DNA origami frame and associated HS-AFM micrographs. Left to right: the layout of the internal suspended DNA molecules (control, NPF and reaction) is shown in reference to an inbuilt polarity marker (black triangle). The RecA NPF (nucleoprotein filament) is formed on the 30 nt ssDNA region of the NPF DNA molecule and is connected into the DNA frame via a UV photocleavable linker (yellow star). Exposure to UV releases the NPF from its tether initiating homologous recombination. This culminates in the formation of a synaptic joint at the region of sequence homology (green) on the reaction DNA. HS-AFM image scale bar = 40 nm.