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Related Concept Videos

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

3.2K
Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Super-resolution Fluorescence Microscopy01:37

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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...
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Related Experiment Video

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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions

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Cryogenic colocalization microscopy for nanometer-distance measurements.

Siegfried Weisenburger, Bo Jing, Dominik Hänni

    Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry
    |March 29, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Cryogenic measurements enhance fluorophore photostability, enabling Angstrom-level single-molecule localization. This technique achieves sub-nanometer accuracy for cryogenic distance measurements, advancing super-resolution microscopy.

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    Area of Science:

    • Biophysics
    • Optical Microscopy
    • Nanotechnology

    Background:

    • Spatial resolution in localization microscopy is photon-limited.
    • Cryogenic measurements enhance fluorophore photostability and precision.
    • Single-molecule localization achieves Angstrom precision.

    Purpose of the Study:

    • To extend cryogenic measurements for colocalizing two fluorophores.
    • To verify sub-nanometer accuracy in cryogenic distance measurements.
    • To explore applications in DNA nanostructures.

    Main Methods:

    • Utilizing cryogenic conditions to improve fluorophore photostability.
    • Attaching two fluorophores to specific positions on double-stranded DNA.
    • Measuring separations of fluorophore pairs at different designed positions.

    Main Results:

    • Demonstrated feasibility of cryogenic distance measurement with sub-nanometer accuracy.
    • Verified accuracy using DNA-based fluorophore pair separations.
    • Achieved Angstrom precision in single-molecule localization.

    Conclusions:

    • Cryogenic localization microscopy enables high-accuracy distance measurements.
    • The method shows potential for improved resolution in super-resolution imaging.
    • Applications include precise structural analysis of biomolecules.