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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.
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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,...
Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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Related Experiment Video

Updated: Jun 2, 2026

Live Cell Imaging of F-actin Dynamics via Fluorescent Speckle Microscopy (FSM)
19:16

Live Cell Imaging of F-actin Dynamics via Fluorescent Speckle Microscopy (FSM)

Published on: August 5, 2009

Fluorescent speckle microscopy.

Lisa A Cameron, Benjamin R Houghtaling, Ge Yang

    Cold Spring Harbor Protocols
    |May 4, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Fluorescent speckle microscopy (FSM) uses low concentrations of labeled molecules to visualize macromolecular assembly dynamics. This technique enables quantitative analysis of cellular structures and their movements in real-time.

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    Live Cell Imaging of F-actin Dynamics via Fluorescent Speckle Microscopy (FSM)
    19:16

    Live Cell Imaging of F-actin Dynamics via Fluorescent Speckle Microscopy (FSM)

    Published on: August 5, 2009

    Conducting Multiple Imaging Modes with One Fluorescence Microscope
    08:32

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    Published on: October 28, 2018

    High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip
    14:09

    High-Throughput Total Internal Reflection Fluorescence and Direct Stochastic Optical Reconstruction Microscopy Using a Photonic Chip

    Published on: November 16, 2019

    Area of Science:

    • Cellular and Molecular Biology
    • Biophysics
    • Microscopy Techniques

    Background:

    • Fluorescent speckle microscopy (FSM) is a live imaging technique for analyzing macromolecular assemblies.
    • It utilizes low concentrations of fluorescently labeled subunits, distinguishing it from photobleaching and photoactivation methods.
    • Speckles, or distinct puncta from random fluorophore distribution, act as markers for visualizing motion and turnover.

    Purpose of the Study:

    • To provide a practical introduction to the principles, experimental implementation, and computational analysis of FSM.
    • To highlight FSM's utility in quantitative analysis of macromolecular assembly dynamics.
    • To demonstrate FSM applications in studying cytoskeletal filament networks.

    Main Methods:

    • Generating and imaging speckles with weak emission signals.
    • Computational analysis of speckle image data characterized by low signal-to-noise ratios and high complexity.
    • Applying FSM to analyze dynamic organization and assembly/disassembly of cytoskeletal filament networks.

    Main Results:

    • FSM enables visualization of macromolecular assembly motion and turnover.
    • Computational analysis transforms FSM into a powerful tool for high-resolution quantitative measurements.
    • Successful FSM application relies on reliable speckle generation, imaging, and data extraction.

    Conclusions:

    • FSM is a valuable technique for studying the dynamics of macromolecular assemblies in live biological systems.
    • Effective implementation requires careful attention to speckle generation, imaging, and sophisticated computational analysis.
    • FSM has shown significant success in analyzing the dynamic behavior of cytoskeletal networks.