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- W3118981907 abstract "Identifying DNA species is crucial for diagnostics. For DNA identification, single-molecule DNA sequence mapping is an alternative to DNA sequencing toward fast point-of-care testing, which traditionally relies on targeting and labeling DNA sequences with fluorescent labels and readout using optical imaging methods. A nanopore is a promising sensor as a complement to optical mapping with advantages of electric measurement suitable for portable devices and potential for high resolution. Here, we demonstrate a high-resolution nanopore-based DNA sequence mapping by labeling specific short sequence motifs with oligodeoxynucleotides (ODNs) using DNA methyltransferase (MTase) and detecting them using nanopores. We successfully detected ODNs down to the size of 11 nucleotides without introducing extra reporters and resolved neighboring sites with a distance of 141 bp (∼48 nm) on a single DNA molecule. To accurately locate the sequence motif positions on DNA, a nanopore data analysis method is proposed by considering DNA velocity change through nanopores and using ensemble statistics to translate the time-dependent signals to the location information. Our platform enables high-resolution detection of small labels on DNA and high-accuracy localization of them for DNA species identification in an all-electrical format. The method presents an alternative to optical techniques relying on fluorescent labels and is promising for miniature-scale integration for diagnostic applications." @default.
- W3118981907 created "2021-01-18" @default.
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- W3118981907 date "2021-01-21" @default.
- W3118981907 modified "2023-10-03" @default.
- W3118981907 title "Electrical DNA Sequence Mapping Using Oligodeoxynucleotide Labels and Nanopores" @default.
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- W3118981907 doi "https://doi.org/10.1021/acsnano.0c07947" @default.
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