A DNA walker moving along a DNA track can perform a series of organic reactions in a single solution without external intervention.
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Rotaru, A., Gothelf, K. Steps towards automated synthesis. Nature Nanotech 5, 760–761 (2010). https://doi.org/10.1038/nnano.2010.211
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DOI: https://doi.org/10.1038/nnano.2010.211
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