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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

Updated: May 11, 2026

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells
11:06

Multi-color Localization Microscopy of Single Membrane Proteins in Organelles of Live Mammalian Cells

Published on: June 30, 2018

Multi-color quantum dot tracking using a high-speed hyperspectral line-scanning microscope.

Patrick J Cutler1, Michael D Malik, Sheng Liu

  • 1Department of Pathology and Cancer Research and Treatment Center, University of New Mexico, Albuquerque, New Mexico, United States of America.

Plos One
|May 30, 2013
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel high-speed hyperspectral microscope (HSM) for tracking membrane protein dynamics. This breakthrough enables precise observation of protein interactions below the diffraction limit in living cells.

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Published on: August 22, 2019

Area of Science:

  • Cellular Biology
  • Microscopy
  • Biophysics

Background:

  • Cellular signaling relies on membrane protein dimerization/oligomerization.
  • Studying these dynamics is challenging due to spatial scales below the diffraction limit.

Purpose of the Study:

  • To develop a novel high-speed hyperspectral microscope (HSM).
  • To enable precise single particle tracking of membrane proteins in living cells.

Main Methods:

  • Utilized a novel high-speed hyperspectral microscope (HSM).
  • Employed multi-color single particle tracking with quantum dots (QDs).
  • Achieved localization with ~10 nm precision at 27 frames per second.

Main Results:

  • Demonstrated dynamic formation and dissociation of Epidermal Growth Factor Receptor dimers.
  • Resolved antigen-induced aggregation of the high-affinity IgE receptor (FcεRI).
  • Performed four-color QD tracking alongside GFP-actin visualization and high-density diffusion mapping.

Conclusions:

  • The HSM allows unprecedented observation of membrane protein dynamics.
  • This technology overcomes diffraction limits for studying protein interactions.
  • Enables detailed analysis of cellular signaling processes at the nanoscale.