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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.

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Related Experiment Video

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Ground State Depletion Super-resolution Imaging in Mammalian Cells
07:55

Ground State Depletion Super-resolution Imaging in Mammalian Cells

Published on: November 5, 2017

A caged, localizable rhodamine derivative for superresolution microscopy.

Sambashiva Banala, Damien Maurel, Suliana Manley

    ACS Chemical Biology
    |October 27, 2011
    PubMed
    Summary
    This summary is machine-generated.

    A new caged rhodamine 110 probe specifically labels SNAP-tag fusion proteins. This photoactivatable dye enables high-contrast imaging in living and fixed cells, ideal for super-resolution microscopy.

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    Published on: June 30, 2018

    Area of Science:

    • Biochemistry
    • Cell Biology
    • Microscopy

    Background:

    • Development of specific probes for protein labeling is crucial in cell biology.
    • Existing fluorescent probes often lack sufficient contrast or require complex activation mechanisms.

    Discussion:

    • A novel caged rhodamine 110 derivative is presented for SNAP-tag fusion protein labeling.
    • The probe utilizes a single caging group for efficient switching from non-fluorescent to highly fluorescent states.
    • This allows for specific labeling of cell surface proteins in live cells and intracellular proteins in fixed cells.

    Key Insights:

    • The caged dye exhibits a high contrast ratio, validated at bulk and single-molecule levels.
    • Its non-fluorescent state is maintained by a single caging group, simplifying probe design.
    • High photon yield and contrast make it suitable for advanced imaging techniques.

    Outlook:

    • Potential applications in super-resolution microscopy, such as photoactivated localization microscopy (PALM).
    • Further optimization for live-cell imaging of dynamic intracellular processes.
    • Exploration of its utility in other bioimaging applications requiring high specificity and contrast.