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Related Concept Videos

Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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Related Experiment Video

Updated: Jan 6, 2026

Combining Single-molecule Manipulation and Imaging for the Study of Protein-DNA Interactions
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Disentangling a Complex Biomolecular World with Single-Molecule Resolution.

Wenxian Tang1, David Fuentenebro Navas2, Benjamin Vermeer3

  • 1Department of Chemistry, University of Basel, Mattenstrasse 22, Building 1096, CH-4058 Basel, Switzerland. wenxian.tang@unibas.ch.

Chimia
|November 29, 2025
PubMed
Summary
This summary is machine-generated.

Single-molecule techniques like nanopore recordings and single-molecule Förster Resonance Energy Transfer (smFRET) overcome limitations of traditional methods. These powerful tools reveal complex biomolecular dynamics and compositions at the highest resolution.

Keywords:
BiomoleculesConformational changeDynamicsFRETNanoporeSingle-molecule technique

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Biochemistry

Background:

  • Biological systems depend on complex mixtures of biomolecules.
  • Biomolecules exhibit dynamic rearrangements, including movement, interactions, and conformational changes, crucial for cellular function.
  • Traditional ensemble techniques struggle to resolve the compositional and dynamic complexities of these systems.

Purpose of the Study:

  • To review single-molecule techniques for analyzing biomolecular complexity.
  • To highlight the capabilities of nanopore recordings and single-molecule Förster Resonance Energy Transfer (smFRET) measurements.
  • To introduce non-expert readers to the benefits of single-molecule experiments in studying biomolecular mechanisms.

Main Methods:

  • Discussion of nanopore recordings as a single-molecule technique.
  • Explanation of single-molecule Förster Resonance Energy Transfer (smFRET) measurements.
  • Focus on resolving biomolecular composition and dynamics at the single-molecule level.

Main Results:

  • Single-molecule techniques offer ultimate resolution for unraveling molecular mixtures.
  • These methods can resolve dynamic biomolecular processes, including time-varying conformations and interactions.
  • Applications include analyzing nucleic acid sequence space, messenger molecule stoichiometries, and protein dynamics.

Conclusions:

  • Single-molecule experiments overcome ensemble averaging and dynamic range limitations.
  • They provide unique, quantitative descriptions of complex biomolecular mechanisms.
  • These techniques are essential for a deeper understanding of life's molecular machinery.