Towards single-molecule DNA sequencing: assays with low nonspecific adsorption |
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Authors: | Krieg Alexander Ruckstuhl Thomas Seeger Stefan |
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Affiliation: | Wellcome Trust Centre for Human Genetics, University of Oxford, Headington, Oxford OX3 7BN, UK. alexander.krieg@well.ox.ac.uk |
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Abstract: | New DNA sequencing techniques are currently being developed using single-molecule fluorescence-based detection of enzymatic double-strand synthesis. Such application requires surface architectures on which single-stranded templates can be immobilized. A further important attribute is a very low tendency to attract fluorescently labeled bases nonspecifically. On this account, the adsorption behaviour of Cy5-dNTPs on a variety of surface coatings was studied by performing real-time measurements of the DNA synthesis using a supercritical angle fluorescence biosensor. It is demonstrated that polyacrylic acid coatings are an excellent choice to minimize the nonspecific binding of the bases. |
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Keywords: | DNA sequencing by synthesis Adsorption Fluorescence detection |
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