Abstract
We reported a classical two-tile system of DAE-O (doublecrossover, antiparallel, and even half-turns tiles with odd half-turns connection) to construct regular single crystalline 2D (two dimensional) DNA lattices, using pre-circularised oligonucleotides of 42-, 64-, and 84-nt (nucleotides) as the central looped strands in DAE tiles respectively. DAE tiles with 42- and 64-nt as central strands, either in circular form or in linear form, grew regular single crystalline lattices well. However DAE tiles including a circular 84-nt as the central strand grew single crystalline lattices, those including a linear 84-nt as the central strand grew polycrystalline 2D lattices. A subtle difference in the lateral rigidity of DAE tiles with regard to the duplex axis was suggested to be the cause of the morphological difference.
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