Super-Resolution mbPAINT for Optical Localization of Single-Stranded DNA
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We demonstrate the application of superlocalization microscopy to identify sequence-specific portions of single-stranded DNA (ssDNA) with sequence resolution of 50 nucleotides, corresponding to a spatial resolution of 30 nm. Super-resolution imaging was achieved using a variation of a single-molecule localization method, termed as モmotion blurヤ point accumulation for imaging in nanoscale topography (mbPAINT). The target ssDNA molecules were immobilized on the substrate. Short, dye-labeled, and complementary ssDNA molecules stochastically bound to the target ssDNA, with repeated binding events allowing super-resolution. Sequence specificity was demonstrated via the use of a control, noncomplementary probe. The results support the possibility of employing relatively inexpensive short ssDNAs to identify gene sequence specificity with improved resolution in comparison to the existing methods.
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Chen, Jixin, Bremauntz, Alberto, Kisley, Lydia, et al.. "Super-Resolution mbPAINT for Optical Localization of Single-Stranded DNA." ACS Applied Materials & Interfaces, 5, no. 19 (2013) American Chemical Society: 9338-9343. http://dx.doi.org/10.1021/am403984k.