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Related Concept Videos

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...

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

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Published on: September 8, 2009

Live cell single-molecule detection in systems biology.

Yasushi Sako1, Michio Hiroshima, Chan-Gi Pack

  • 1Cellular Informatics Laboratory, RIKEN, Wako, Japan. sako@riken.jp

Wiley Interdisciplinary Reviews. Systems Biology and Medicine
|September 14, 2011
PubMed
Summary

Single-fluorophore imaging and detection allow direct observation of biological molecules in living cells. This technology provides precise kinetic and dynamic data for systems biology and medicine applications.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Systems Biology

Background:

  • Biological reactions occur in aqueous environments.
  • Optical microscopy enables observation of biological molecules.
  • Single-molecule imaging allows direct observation of molecular processes.

Purpose of the Study:

  • To review the technology and applications of single-fluorophore imaging and detection in living cells.
  • To highlight the utility of these techniques in systems biology and medicine.
  • To emphasize the value of single-molecule data for understanding cellular systems.

Main Methods:

  • Single-fluorophore imaging using optical microscopes.
  • Single-molecule detection techniques.
  • Super-localization microscopy for enhanced spatial resolution.

Main Results:

  • Direct observation of single molecules in living cells and organisms.
  • Determination of absolute kinetic and dynamic parameters of molecular reactions.
  • Improved spatial resolution through super-localization techniques.
  • Detection of concentrations, diffusion, and molecular interactions in the cytoplasm.

Conclusions:

  • Single-molecule imaging and detection provide precise, absolute parameters of biological reactions without disrupting cellular integrity.
  • These parameters are directly applicable to kinetic and dynamic models in systems biology and medicine.
  • The technology enables a deeper understanding of molecular mechanisms within complex cellular systems.