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- Publisher
- Springer Journals
- Copyright
- Copyright © 2001 by Nature Publishing Group
- Subject
- Life Sciences; Life Sciences, general; Biotechnology; Biomedicine, general; Agriculture; Biomedical Engineering/Biotechnology; Bioinformatics
- ISSN
- 1087-0156
- eISSN
- 1546-1696
- DOI
- 10.1038/86762
- Publisher site
- See Article on Publisher Site
Abstract
Here we describe a hybrid material composed of a single-stranded DNA (ssDNA) molecule, a 1.4 nm diameter gold nanoparticle, and a fluorophore that is highly quenched by the nanoparticle through a distance-dependent process. The fluorescence of this hybrid molecule increases by a factor of as much as several thousand as it binds to a complementary ssDNA. We show that this composite molecule is a different type of molecular beacon with a sensitivity enhanced up to 100-fold. In competitive hybridization assays, the ability to detect single mismatch is eightfold greater with this probe than with other molecular beacons.
Journal
Nature Biotechnology – Springer Journals
Published: Apr 1, 2001