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- W2081579244 abstract "A rapid assay operable under isothermal or nonisothermal conditions is described, where the sensitivity of a typical molecular beacon (MB) system is improved by using thermostable RNase H to enzymatically cleave an MB composed of a DNA stem and an RNA loop (R/D-MB). On hybridization of the R/D-MB to target DNA, there was a modest increase in fluorescence intensity (∼5.7× above background) due to an opening of the probe and a concomitant reduction in the Förster resonance energy transfer efficiency. The addition of thermostable RNase H resulted in the cleavage of the RNA loop, which eliminated energy transfer. The cleavage step also released bound target DNA, enabling it to bind to another R/D-MB probe and rendering the approach a cyclic amplification scheme. Full processing of R/D-MBs maximized the fluorescence signal to the fullest extent possible (12.9× above background), resulting in an approximately 2- to 2.8-fold increase in the signal-to-noise ratio observed isothermally at 50 °C following the addition of RNase H. The probe was also used to monitor real-time polymerase chain reactions by measuring enhancement of donor fluorescence on R/D-MB binding to amplified pUC19 template dilutions. Hence, the R/D-MB–RNase H scheme can be applied to a broad range of nucleic acid amplification methods." @default.
- W2081579244 created "2016-06-24" @default.
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- W2081579244 date "2013-01-01" @default.
- W2081579244 modified "2023-10-16" @default.
- W2081579244 title "Enzymatic amplification of DNA/RNA hybrid molecular beacon signaling in nucleic acid detection" @default.
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- W2081579244 doi "https://doi.org/10.1016/j.ab.2012.09.015" @default.
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