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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

4.7K
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.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
4.7K

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Probing The Structure And Dynamics Of Nucleosomes Using Atomic Force Microscopy Imaging
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Imaging DNA Structure by Atomic Force Microscopy.

Alice L B Pyne1, Bart W Hoogenboom2

  • 1London Centre for Nanotechnology and Department of Physics and Astronomy, University College London, 17-19 Gordon Street, London, WC1H 0AH, UK. alice.pyne@ucl.ac.uk.

Methods in Molecular Biology (Clifton, N.J.)
|June 11, 2016
PubMed
Summary

Atomic force microscopy (AFM) visualizes DNA's structure and interactions at the nanoscale. This technique allows detailed examination of DNA's superstructure, secondary structure, and interactions with other molecules in aqueous conditions.

Keywords:
AFMAtomic force microscopyDNADNA–protein bindingDouble helixSupercoiling

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Nanotechnology

Background:

  • Atomic force microscopy (AFM) offers high-resolution surface imaging.
  • AFM is advantageous for biological samples in aqueous environments.
  • Visualizing nanoscale structures of biomolecules is crucial for understanding their function.

Purpose of the Study:

  • To apply AFM for determining the superstructure and secondary structure of surface-bound DNA.
  • To demonstrate the utility of AFM in probing DNA-DNA interactions.
  • To showcase AFM's capability in analyzing DNA-protein complexes.

Main Methods:

  • Utilizing atomic force microscopy (AFM) with a sharp probe.
  • Imaging surface-bound DNA at nanometre resolution.
  • Performing measurements in an aqueous environment.

Main Results:

  • AFM successfully determined the superstructure of surface-bound DNA.
  • Secondary structure details of DNA were resolved using AFM.
  • The method proved effective for probing DNA-DNA interactions and DNA-protein complexes.

Conclusions:

  • AFM is a powerful tool for nanoscale structural analysis of DNA.
  • The technique provides insights into DNA's higher-order organization and interactions.
  • AFM facilitates the study of molecular interactions in biological systems.