Identifying single bases in a DNA oligomer with electron tunnelling.
Identifying single bases in a DNA oligomer with electron tunnelling.
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用电子隧道识别DNA低聚物中的单个碱基。
DOI:
10.1038/nnano.2010.213
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发表时间:
2010-12
影响因子:
38.3
通讯作者:
中科院分区:
文献类型:
--
作者:
Single-molecule DNA sequencing based on measuring the physical properties of bases as they pass through a nanopore eliminates the need for the enzymes and reagents used in other approaches. Theoretical calculations indicate that electron tunneling could identify bases in single-stranded DNA, yielding long reads and eliminating enzymatic processing. It was shown recently that tunneling can sense individual nucleotides and nucleosides. Here, we show that tunneling electrodes functionalized with recognition reagents can identify a single base flanked by other bases in a short DNA oligomer. The residence time of a single base in a recognition junction is on the order of a second, but pulling the DNA through the junction with a force of tens of piconewtons would yield reading speeds of tens of bases per second.
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DOI:
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发表时间:
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影响因子:
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通讯作者:
Lindsay, Stuart M.