Restriction mapping in nanofluidic devices.

Riehn, Robert; Lu, Manchun; Wang, Yan-Mei; Lim, Shuang Fang; Cox, Edward C; Austin, Robert H · Proc Natl Acad Sci U S A · 2005

basic_science · Level V

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Abstract

We have performed restriction mapping of DNA molecules using restriction endonucleases in nanochannels with diameters of 100-200 nm. The location of the restriction reaction within the device is controlled by electrophoresis and diffusion of Mg2+ and EDTA. We have successfully used the restriction enzymes SmaI, SacI, and PacI, and have been able to measure the positions of restriction sites with a precision of approximately 1.5 kbp in 1 min using single DNA molecules.

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