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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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Updated: Jun 20, 2026

Visualizing Single Molecular Complexes In Vivo Using Advanced Fluorescence Microscopy
11:26

Visualizing Single Molecular Complexes In Vivo Using Advanced Fluorescence Microscopy

Published on: September 8, 2009

Visualizing single molecular complexes in vivo using advanced fluorescence microscopy.

Ian M Dobbie1, Alexander Robson, Nicolas Delalez

  • 1Biochemistry, University of Oxford.

Journal of Visualized Experiments : Jove
|September 10, 2009
PubMed
Summary
This summary is machine-generated.

Researchers developed advanced optical microscopy to monitor single proteins in living bacterial cells. This non-invasive technique reveals molecular dynamics, offering physiologically relevant insights into cellular processes.

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Visualizing Single Molecular Complexes In Vivo Using Advanced Fluorescence Microscopy
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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
12:51

Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy

Published on: December 9, 2013

Area of Science:

  • Cellular Biology
  • Biophysics
  • Microscopy

Background:

  • Understanding cellular mechanisms requires investigating key processes at the molecular level.
  • Traditional bulk measurements mask the stochastic nature of single-molecule events crucial for cell function.
  • Existing single-molecule techniques often struggle with the complexity and invasiveness required for living systems.

Purpose of the Study:

  • To demonstrate a minimally-perturbative, non-invasive method for monitoring single proteins within living bacterial cells.
  • To enable observation of molecular complex dynamics in functioning biological machines.
  • To provide physiologically relevant data by studying cells with naturally encoded protein levels.

Main Methods:

  • Advanced optical microscopy for high-precision imaging.
  • Analytical image analysis tools for detailed observation.
  • Genomic encoding of fluorescently-tagged proteins to mimic natural expression levels.

Main Results:

  • Successful monitoring of proteins at the single-molecule level in living bacterial cells.
  • Observation of dynamics within molecular complexes in functioning biological machines.
  • Demonstration of minimally-perturbative and non-invasive techniques suitable for live-cell studies.

Conclusions:

  • Advanced optical microscopy and analytical tools enable precise single-molecule protein monitoring in vivo.
  • The developed techniques offer a physiologically relevant approach to studying cellular dynamics.
  • This method overcomes limitations of traditional bulk measurements and less ideal expression systems.