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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,...

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Related Experiment Video

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Simultaneous Multicolor Imaging of Biological Structures with Fluorescence Photoactivation Localization Microscopy
12:51

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Published on: December 9, 2013

Bleaching/blinking assisted localization microscopy for superresolution imaging using standard fluorescent molecules.

Dylan T Burnette1, Prabuddha Sengupta, Yuhai Dai

  • 1The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA.

Proceedings of the National Academy of Sciences of the United States of America
|December 15, 2011
PubMed
Summary
This summary is machine-generated.

A new superresolution imaging method, bleaching/blinking assisted localization microscopy (BaLM), uses standard fluorescent probes without special activation. This technique simplifies superresolution microscopy by detecting natural fluorophore blinking and bleaching events for precise molecular localization.

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Area of Science:

  • Biophysics
  • Optical Microscopy
  • Nanotechnology

Background:

  • Superresolution microscopy achieves nanoscale resolution by localizing single fluorescent molecules.
  • Techniques like photoactivated localization microscopy (PALM) and stochastic optical reconstruction microscopy (STORM) require specialized photoactivatable or photoswitching probes, posing technical challenges.
  • Existing methods necessitate complex probe chemistries for high-resolution imaging.

Purpose of the Study:

  • To present a simple and practical superresolution imaging technique that avoids photoactivatable or photoswitching probes.
  • To develop a method utilizing intrinsic fluorophore properties for molecular localization.
  • To enable superresolution imaging with conventional fluorescent probes.

Main Methods:

  • Introduced bleaching/blinking assisted localization microscopy (BaLM), a point localization-based superresolution imaging technique.
  • Acquired a stream of fluorescence images to capture natural fluorophore bleaching and blinking events.
  • Detected single fluorophore events by image subtraction (subsequent-previous for bleaching/blink-off, previous-subsequent for blink-on) and localized them by fitting fluorescence intensity distributions with a Gaussian.

Main Results:

  • BaLM successfully produces superresolution images without specialized photoactivatable or photoswitching probes.
  • The technique leverages the inherent bleaching and blinking behaviors of common fluorescent probes.
  • Demonstrated BaLM's compatibility with multiple conventional fluorescent probes within the same sample.

Conclusions:

  • BaLM offers a simplified and practical approach to superresolution microscopy.
  • The method broadens the applicability of single-molecule localization microscopy to samples labeled with conventional fluorophores.
  • BaLM extends superresolution capabilities to diverse biological and material science applications.