Nucleic Acids Research, 2002, Vol. 30, No. 12 e61
© 2002 Oxford University Press
Label-free hybridization detection of a single nucleotide mismatch by immobilization of molecular beacons on an agarose film
Chien-Shiung Wu Laboratory, Department of Biomedical Engineering, Southeast University, Nanjing, China
We developed a new technique to immobilize a set of molecular beacons on an agarose film-coated slide and found that it has the ability to identify a single nucleotide difference in label-free DNA targets. The annealing properties, specificity and hybridization dynamics of the present technique were compared with those of the conventional technique that directly immobilizes molecular beacons on a planar glass slide. It is demonstrated that the molecular beacon array on an agarose film has high quench efficiency, an excellent discrimination ratio for single nucleotide mismatches and a short detection time. We hypothesize that such a low fluorescence background and high specificity molecular beacon array will find practical applications in label-free, high-throughput mutation analysis and disease diagnosis.
* To whom correspondence should be addressed. Tel: +86 25 3619983; Fax: +86 25 7712719; Email: zhlu{at}seu.edu.cn
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