2013
DOI: 10.1002/cbic.201300073
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Highly Efficient Förster Resonance Energy Transfer in a Fast, Serum‐Compatible Immunoassay

Abstract: Highly efficient FRET leads to important enhancements for homogeneous immunoassays. By using the novel phosphorescent dye EuLH and BHQ-10 as a donor-acceptor pair, the FRET efficiency increases to >99.5 %, leading to significantly improved signal-to-background ratio, precision and linear range. The phosphorescence detection enabled full compatibility to serum samples for this fast-responding immunoassay.

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Cited by 6 publications
(5 citation statements)
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“…Whilst solution-based fluorescent sensors offer a significant advantage in terms of bindingkinetics over analogous heterogenous sensors. [31] Heterogenous immobilisation of a fluorescent sensor is preferential as it avoids contamination of the sensor in a practical situtation, i.e. in vivo.…”
Section: Resultsmentioning
confidence: 99%
“…Whilst solution-based fluorescent sensors offer a significant advantage in terms of bindingkinetics over analogous heterogenous sensors. [31] Heterogenous immobilisation of a fluorescent sensor is preferential as it avoids contamination of the sensor in a practical situtation, i.e. in vivo.…”
Section: Resultsmentioning
confidence: 99%
“…Thus, as a consequence of minimizing jitter, the needed transfer rate decreases with the maximum number of photons to be resolved. One mechanism for energy transfer is Forster resonant energy transfer (FRET), with time scales on the order of picoseconds 30 and efficiencies that can attain near 100%, 31 which can be further tuned with the optical environment. 32 This implies that the configuration of Figure 4 would be able to resolve photon number as long as the pulse is longer than a picosecond.…”
Section: ■ Physical Realization and Parametersmentioning
confidence: 99%
“…Since FRET occurs over distances at biologically relevant length scales (∼1−20 nm), many biological phenomena that produce changes in molecular proximity (e.g., ligand−receptor binding, molecular structural changes) can be investigated using this technique. In this context, homogeneous FRET assays have been widely used for sensitive detection of molecules such as drugs, 72 antigens, 62,73 proteins, 74 peptides, 75 and cancer biomarkers. 76 Despite the simplicity of homogeneous FRET detection, background fluorescence interferences caused by molecules present in the complex biological fluids may mask the detection signal.…”
Section: Detection In Solutionmentioning
confidence: 99%