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Labeling DNA Probes03:31

Labeling DNA Probes

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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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Compact Quantum Dots for Single-molecule Imaging
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Surface modified quantum dots as fluorescent probes for biomolecule recognition.

Vaibhavkumar N Mehta, Suresh Kumar Kailasa, Hui-Fen Wu

    Journal of Nanoscience and Nanotechnology
    |April 16, 2014
    PubMed
    Summary

    Functional nanomaterials, especially quantum dots (QDs), offer sensitive detection of biomolecules for clinical diagnosis. This review explores their use as fluorescent probes via fluorescence quenching and FRET.

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    Area of Science:

    • Biomolecular analysis
    • Nanomaterials science
    • Analytical chemistry

    Background:

    • Nanomaterial-based analytical methods are advancing biological analysis in proteomics and clinical diagnosis.
    • Functional nanomaterials enhance detection sensitivity by integrating with analytical tools for bioanalysis.
    • Quantum dots (QDs) show promise as fluorescent sensors for biomolecule assays due to superior optical properties.

    Purpose of the Study:

    • To review the application of surface-modified quantum dots (QDs) as fluorescence probes.
    • To highlight QD-based detection methods for proteins, peptides, and other biomolecules.

    Main Methods:

    • Utilizing fluorescence quenching mechanisms for QD-based detection.
    • Employing fluorescence resonance energy transfer (FRET) with QDs for biomolecule sensing.

    Main Results:

    • Surface-modified QDs demonstrate high potential as sensitive fluorescent probes.
    • QD fluorescence can be modulated by interactions with target biomolecules.

    Conclusions:

    • Quantum dots offer a versatile platform for developing advanced biosensors.
    • QD-based fluorescence methods provide sensitive and stable detection for various biomolecules in diagnostics and proteomics.