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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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Updated: May 28, 2025

Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
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Molecular Level Super-Resolution Fluorescence Imaging.

Niels Radmacher1, Alexey I Chizhik1, Oleksii Nevskyi1

  • 1Third Institute of Physics - Biophysics, Georg August University of Göttingen, Göttingen, Germany;

Annual Review of Biophysics
|February 14, 2025
PubMed
Summary
This summary is machine-generated.

Advanced fluorescence microscopy techniques like single-molecule localization microscopy (SMLM) are achieving unprecedented resolution, rivaling electron microscopy. Innovations such as DNA-PAINT and MINFLUX overcome limitations, enabling molecular-level imaging.

Keywords:
expansion microscopyfluorescence lifetime super-resolution microscopymolecular resolutionsingle-molecule localization microscopy

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Area of Science:

  • Optical Microscopy
  • Biophysics
  • Nanotechnology

Background:

  • Fluorescence microscopy has significantly advanced over 30 years in resolving fine details.
  • Techniques like STED, photoactivatable localization microscopy, and STORM have progressively improved resolution.
  • Single-molecule localization microscopy (SMLM) offers enhanced resolution by overcoming photobleaching.

Purpose of the Study:

  • To review the latest developments in single-molecule localization microscopy (SMLM).
  • To highlight advanced SMLM methods and their potential impact on biological imaging.
  • To discuss techniques pushing the boundaries toward molecular resolution.

Main Methods:

  • Discussion of single-molecule localization microscopy (SMLM) encompassing methods like direct STORM.
  • Exploration of DNA point accumulation for imaging in nanoscale topography (DNA-PAINT) for continuous label renewal.
  • Review of minimal photon fluxes imaging (MINFLUX), resolution enhancement by sequential imaging (RESI), and PAINT-MINFLUX.

Main Results:

  • SMLM achieves higher resolution than STED by overcoming photobleaching, particularly with DNA-PAINT.
  • Cryo-fluorescence microscopy and MINFLUX are advancing SMLM toward molecular resolution.
  • New methods like RESI and PAINT-MINFLUX are further enhancing imaging capabilities.

Conclusions:

  • Recent advancements in SMLM are revolutionizing fluorescence microscopy.
  • Techniques discussed offer resolution comparable to electron microscopy.
  • Future developments promise unprecedented insights into biological structures at the molecular level.