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Fitting a biological nanopore into a man-made one, new ways to analyze DNA
Date:11/29/2010

Researchers at Delft University of Technology and Oxford University announce a new type of nanopore device that could help in developing fast and cheap genetic analysis. In the journal Nature Nanotechnology (November 28), they report on a novel method that combines man-made and biological materials to result in a tiny hole on a chip, which is able to measure and analyze single DNA molecules.

Biological

"The first mapping of the human genome - where the content of the human DNA was read off ('sequenced') - was completed in 2003 and it cost an estimated 3 billion US dollars. Imagine if that cost could drop to a level of a few 100 euro, where everyone could have their own personal genome sequenced. That would allow doctors to diagnose diseases and treat them before any symptoms arise." Professor Cees Dekker of the Kavli Institute of Nanoscience at Delft explains.

One promising device is called a nanopore: a minute hole that can be used to 'read' information from a single molecule of DNA as it threads through the hole.

New research by Dekker's group in collaboration with prof. Hagan Bayley of Oxford University, has now demonstrated a new, much more robust type of nanopore device. It combines biological and artificial building blocks.

Fragile

Dekker: 'Nanopores are already used for DNA analysis by inserting naturally occurring, pore-forming proteins into a liquid-like membrane made of lipids. DNA molecules can be pulled individually through the pore by applying an electrical voltage across it, and analyzed in much the same way that music is read from an old cassette tape as it is threaded through a player. One aspect that makes this biological technology especially difficult, however, is the reliance on the fragile lipid support layer. This new hybrid approach is much more robust and suitable to integrate nanopores into devices. '

Putting proteins onto a silicon chip

The new research, perfo
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Contact: Cees Dekker
c.dekker@tudelft.nl
Delft University of Technology
Source:Eurekalert

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