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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
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Related Experiment Video

Updated: Oct 27, 2025

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping
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Atomic force microscopy-A tool for structural and translational DNA research.

Kavit H S Main, James I Provan1, Philip J Haynes

  • 1Institute of Molecular, Cell, and Systems Biology, University of Glasgow, Glasgow G12 8QQ, United Kingdom.

APL Bioengineering
|July 21, 2021
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This summary is machine-generated.

Atomic force microscopy (AFM) provides nanoscale imaging of DNA structure and dynamics in native states. This technique reveals DNA mechanics and interactions with proteins and drugs, advancing cancer research.

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Nanotechnology

Background:

  • Atomic force microscopy (AFM) offers nanoscale resolution for imaging biomolecules.
  • AFM enables visualization of biological molecules in native, physiological conditions without labeling.
  • DNA has been a primary subject for AFM studies, from conformational diversity to protein interactions.

Purpose of the Study:

  • To review advancements in AFM imaging for understanding DNA.
  • To explore AFM's role in studying DNA structure, mechanics, and interactions.
  • To highlight AFM's application in translational cancer research with chemotherapeutic ligands.

Main Methods:

  • Utilizing atomic force microscopy (AFM) for high-resolution imaging of DNA.
  • Applying AFM to study DNA in solution under physiological conditions.
  • Analyzing AFM data to understand DNA secondary and tertiary structures and dynamics.

Main Results:

  • AFM has elucidated DNA's conformational diversity and intramolecular variations.
  • In situ imaging revealed insights into DNA-protein and DNA-ligand interactions, including assembly, flexibility, and movement.
  • AFM studies have demonstrated the impact of protein binding on DNA structure.

Conclusions:

  • Innovations in AFM imaging have significantly advanced the understanding of DNA structure, mechanics, and interactions.
  • AFM is a crucial tool for investigating dynamic biological processes at the nanoscale.
  • AFM shows promise in translational cancer research for evaluating DNA-chemotherapeutic ligand interactions.