Why not let things go skew-whiff? A rational approach was used to program the self-assembly of a DNA octahedron (see structure; the color gradient indicates the distance from the center of the octahedron). Detailed structural characterization revealed that the assembly of the nanoobjects was stereoselective (a view of a vertex is shown with the skewed cavity that provided a handle for determination of the chirality of the octahedra).
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He et al. (2009) studied this question.
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