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Related Concept Videos

Confocal Fluorescence Microscopy01:16

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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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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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Integral membrane proteins are tightly associated with the cell membrane and play a crucial role in cell communication, signaling, adhesion, and transport of the molecules. Some integral membrane proteins are present only in the membrane monolayer. For example, the enzyme fatty acid amide hydrolase is present in the cytoplasmic side of the membrane monolayer. In contrast, another type of integral membrane protein, also known as a transmembrane protein, spans across the membrane. Transmembrane...
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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Related Experiment Video

Updated: Jan 25, 2026

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
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Fluorescence microscopy for visualizing single-molecule protein dynamics.

Hiroaki Yokota1

  • 1Biophotonics Laboratory, Graduate School for the Creation of New Photonics Industries, Kurematsu-cho, Nishi-ku, Hamamatsu, Shizuoka 431-1202, Japan.

Biochimica Et Biophysica Acta. General Subjects
|May 13, 2019
PubMed
Summary
This summary is machine-generated.

Single-molecule fluorescence imaging (smFI) offers real-time insights into protein dynamics. Advances in microscopy and fluorescent nanodiamonds promise enhanced precision for complex biomolecular studies.

Keywords:
Fluorescent nanodiamond (FND)Optically detected magnetic resonance (ODMR)Protein dynamicsSingle-molecule fluorescence imaging (smFI)Super-resolution microscopy

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Area of Science:

  • Biophysics
  • Biochemistry
  • Microscopy

Background:

  • Single-molecule fluorescence imaging (smFI) enables real-time observation of individual protein molecules.
  • It provides detailed insights into molecular dynamics, crucial for biophysical and biochemical studies.
  • smFI has synergistically developed with advanced microscopy, optics, and nanomaterials.

Purpose of the Study:

  • To provide an overview of recent single-molecule fluorescence microscopy methods.
  • To highlight techniques for high-precision in vitro measurements.
  • To discuss the potential of fluorescent nanodiamonds in advancing smFI.

Main Methods:

  • Review of single-molecule fluorescence microscopy techniques.
  • Focus on methods for enhanced precision in vitro.
  • Exploration of fluorescent nanodiamonds as novel fluorophores.

Main Results:

  • Recent advancements in single-molecule fluorescence microscopy are presented.
  • Fluorescent nanodiamonds are identified as a promising fluorophore for improved smFI.
  • Techniques for higher-precision in vitro measurements are discussed.

Conclusions:

  • smFI will advance through improved fluorophore photostability.
  • Integration with nanofabrication and single-molecule manipulation will drive future development.
  • Quantitative, high-resolution studies are key to understanding protein dynamics and complex biological systems.