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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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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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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Related Experiment Video

Updated: Apr 15, 2026

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
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A user-friendly two-color super-resolution localization microscope.

Teng Zhao, Ying Wang, Yuanliang Zhai

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    |April 4, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a robust two-color super-resolution microscopy method using Alexa647 and Alexa750 dyes. The technique enables simultaneous imaging of multiple targets with high precision in various biological samples.

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    Area of Science:

    • Biophysics
    • Microscopy
    • Cell Biology

    Background:

    • Super-resolution microscopy techniques are crucial for visualizing cellular structures at the nanoscale.
    • Developing robust and efficient multi-color imaging methods is essential for complex biological investigations.

    Purpose of the Study:

    • To develop and validate a robust two-color super-resolution localization microscopy method.
    • To enable simultaneous imaging of two distinct targets with high spatial resolution and accuracy.

    Main Methods:

    • Utilized a two-dye combination of Alexa647 and Alexa750 in a specialized imaging buffer.
    • Employed Tris(2-carboxyethyl)phosphine (TCEP) as a reliable switching regent for balanced dye performance.
    • Implemented active sample locking for sub-nanometer sample stabilization during imaging.

    Main Results:

    • Achieved matched and balanced switching characteristics for both Alexa647 and Alexa750 dyes.
    • Enabled simultaneous capture of both fluorescent signals on a single camera with high photon emission (>4,000 photons).
    • Generated high-quality two-color super-resolution images across diverse biological samples, including cell cultures, tissue sections, and yeast cells.

    Conclusions:

    • The developed two-color super-resolution method offers a robust and versatile tool for advanced biological imaging.
    • This technique facilitates detailed co-localization studies and structural analysis of complex biological systems.