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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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Super-resolution Fluorescence Microscopy

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Related Experiment Video

Updated: Jun 7, 2026

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

Massively parallel bead-free force spectroscopy with fluorescence.

Adam B Yasunaga1, Ryan Riopel1, David T R Bakker1

  • 1Department of Chemistry, The University of British Columbia, Kelowna, BC V1V1V7, Canada.

Science Advances
|June 5, 2026
PubMed
Summary
This summary is machine-generated.

Tether force spectroscopy (TFS) offers a bead-free method for single-molecule force spectroscopy. This new technique uses DNA tethers for precise force application and calibration, improving biomolecular mechanics studies.

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Ensemble Force Spectroscopy by Shear Forces
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Ensemble Force Spectroscopy by Shear Forces

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Last Updated: Jun 7, 2026

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Ensemble Force Spectroscopy by Shear Forces
07:30

Ensemble Force Spectroscopy by Shear Forces

Published on: July 26, 2022

Area of Science:

  • Biophysics
  • Biomolecular Mechanics
  • Biotechnology

Background:

  • Current single-molecule force spectroscopy (SMFS) methods utilize beads for force application, leading to variability and artifacts.
  • Existing techniques face challenges with calibration, multitether artifacts, and confounding effects from long DNA handles.
  • There is a need for improved high-throughput SMFS platforms with greater precision and reduced experimental complexity.

Purpose of the Study:

  • To introduce Tether Force Spectroscopy (TFS), a novel bead-free platform for single-molecule force spectroscopy.
  • To demonstrate TFS's capability to apply uniform, internally calibrated forces using DNA tethers.
  • To enable simultaneous force measurements and single-molecule fluorescence monitoring for correlating structure and function.

Main Methods:

  • Developed a bead-free single-molecule force spectroscopy platform (TFS).
  • Utilized shear flow acting on identical DNA tethers to apply piconewton-scale forces.
  • Integrated TFS with single-molecule fluorescence for simultaneous conformational dynamics monitoring.

Main Results:

  • Achieved high-resolution, high-throughput measurements across hundreds of molecules.
  • Demonstrated the ability to perform both force-extension and rupture experiments without specialized instrumentation.
  • Showcased uniform, internally calibrated forces applied directly to surface-anchored molecules.

Conclusions:

  • TFS provides a simplified, bead-free approach to single-molecule force spectroscopy.
  • The platform offers inherent compatibility with single-molecule fluorescence, enabling structure-function correlations.
  • TFS is broadly accessible for diverse biomolecular systems, advancing the study of biomolecular mechanics.