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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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Related Experiment Video

Updated: May 21, 2026

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope
06:45

Force Spectroscopy of Single Protein Molecules Using an Atomic Force Microscope

Published on: February 28, 2019

Single molecule force spectroscopy using polyproteins.

Toni Hoffmann1, Lorna Dougan

  • 1School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom.

Chemical Society Reviews
|June 1, 2012
PubMed
Summary
This summary is machine-generated.

Single molecule force spectroscopy, using atomic force microscopy (AFM), reveals protein mechanical stability and folding pathways. This technique provides insights into the physical mechanisms governing protein folding dynamics.

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Last Updated: May 21, 2026

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Area of Science:

  • Biophysics
  • Biochemistry
  • Molecular Biology

Background:

  • Single molecule force spectroscopy is a key technique for investigating protein mechanical properties.
  • Understanding protein folding mechanisms is crucial in molecular biology.

Purpose of the Study:

  • To provide a tutorial review of single molecule force spectroscopy using AFM.
  • To explain AFM force spectroscopy modes (force-extension and force-clamp).
  • To review recent research and highlight emerging areas in single molecule protein folding.

Main Methods:

  • Utilizing atomic force microscopy (AFM) for force spectroscopy.
  • Employing force-extension and force-clamp modes of AFM.
  • Using polyproteins to generate mechanical fingerprints of protein responses.

Main Results:

  • Demonstrated the application of AFM for measuring protein unfolding and folding trajectories.
  • Highlighted the utility of polyproteins in characterizing protein mechanical stability.
  • Reviewed significant contributions and emerging trends in the field.

Conclusions:

  • Single molecule force spectroscopy offers powerful insights into protein folding mechanisms.
  • AFM-based techniques are advancing our understanding of protein biophysics.
  • This review serves as a guide to the field and its future directions.