Reverse DNA translocation through a solid-state nanopore by magnetic tweezers.

Reverse DNA translocation through a solid-state nanopore by magnetic tweezers.
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DOI:
10.1088/0957-4484/20/18/185101
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发表时间:
2009-05-06
期刊:
影响因子:
3.5
通讯作者:
Ling XS
Ling XS
中科院分区:
材料科学3区
文献类型:
--
作者:
Peng H;Ling XS

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通过纳米孔进行电压驱动的DNA易位在分子生物学和生物技术中有着广泛的应用前景。然而,在标准的DNA易位过程中,DNA的运动在本质上是难以控制的,在标准的DNA易位过程中,需要一个强大的电场才能将DNA拉入孔中,但这也导致了DNA的快速易位不可控。在这里,我们探索一种新的DNA易位。我们称之为“反向DNA易位”,在磁场梯度的驱动下,DNA被磁珠机械地拉过纳米孔。该技术与同时离子电流测量兼容,适用于多个纳米孔,为大规模应用铺平了道路。我们报告了使用磁镊子通过固态纳米孔进行反向DNA易位的第一个实验。
Voltage-driven DNA translocation through nanopores has attracted wide interest for many potential applications in molecular biology and biotechnology. However, it is intrinsically difficult to control the DNA motion in standard DNA translocation processes in which a strong electric field is required in drawing DNA into the pore, but it also leads to uncontrollable fast DNA translocation. Here we explore a new type of DNA translocation. We dub it ‘reverse DNA translocation’, in which the DNA is pulled through a nanopore mechanically by a magnetic bead, driven by a magnetic-field gradient. This technique is compatible with simultaneous ionic current measurements and is suitable for multiple nanopores, paving the way for large scale applications. We report the first experiment of reverse DNA translocation through a solid-state nanopore using magnetic tweezers.
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