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- W2038895087 abstract "The majority of efforts to increase specificity or sensitivity in biosensors result in trade-offs with little to no gain in overall accuracy. This is because a biosensor cannot be more accurate than the affinity interaction it is based on. Accordingly, we have developed a new class of reagents based on mathematical principles of cooperativity to enhance the accuracy of the affinity interaction. Tentacle probes (TPs) have a hairpin structure similar to molecular beacons (MBs) for enhanced specificity, but are modified by the addition of a capture probe for increased kinetics and affinity. They produce kinetic rate constants up to 200-fold faster than MB with corresponding stem strengths. Concentration-independent specificity was observed with no false positives at up to 1 mM concentrations of variant analyte. In contrast, MBs were concentration dependent and experienced false positives above 3.88 μM of variant analyte. The fast kinetics of this label-free reagent may prove important for extraction efficiency, hence sensitivity and detection time, in microfluidic assays. The concentration-independent specificity of TPs may prove extremely useful in assays where starting concentrations and purities are unknown as would be the case in bioterror or clinical point of care diagnostics." @default.
- W2038895087 created "2016-06-24" @default.
- W2038895087 creator A5039938601 @default.
- W2038895087 creator A5048388860 @default.
- W2038895087 creator A5079091432 @default.
- W2038895087 date "2007-04-22" @default.
- W2038895087 modified "2023-10-17" @default.
- W2038895087 title "Tentacle probes: eliminating false positives without sacrificing sensitivity" @default.
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- W2038895087 doi "https://doi.org/10.1093/nar/gkm113" @default.
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