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Induced fluorescence resonance energy transfer (iFRET) is a variation of resonance energy transfer that is particularly well-suited for the detection of DNA hybridization. The underlying mechanism involves monitoring changes in fluorescence that are the result of an energy transfer reaction between a specific pair of donor and acceptor moieties. In iFRET, the donor is a dye that only fluoresces while interacting with double-stranded DNA and the acceptor is dye that is covalently linked to an oligonucleotide probe. Hybridization of the probe to its complement induces excitement of the donor dye and subsequent energy transfer to the acceptor dye. The energy transfer reaction (and concomitant hybridization status) can easily be followed by monitoring the fluorescence output of the acceptor dye. Because the interaction of the donor dye is reversible and dependent on the presence of double-stranded DNA, iFRET is extremely useful and herein demonstrated in the generation of DNA melting curves.
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| http://dx.doi.org/10.1385/1-59745-069-3:33 | DOI Listing |
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