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Related Concept Videos

Atomic Force Microscopy01:08

Atomic Force Microscopy

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...
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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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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

Structural and dynamic characterization of biochemical processes by atomic force microscopy.

Frédéric Eghiaian1, Iwan A T Schaap

  • 1Drittes Physikalisches Institut, Georg August Universität, Göttingen, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|August 3, 2011
PubMed
Summary

Atomic Force Microscopy (AFM) offers non-disruptive imaging of biological samples in liquid, providing pN to nN force measurements. This technique enables high-resolution analysis of enzyme dynamics at room temperature.

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

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Area of Science:

  • Biophysics
  • Nanotechnology
  • Biochemistry

Background:

  • Atomic Force Microscopy (AFM) is increasingly utilized in biophysics for its force measurement and imaging capabilities.
  • AFM operates on biologically relevant scales (nm to μm) and measures forces in the pN to nN range.
  • Recent advancements allow non-disruptive, rapid imaging of delicate biological samples in liquid environments.

Purpose of the Study:

  • To explain the fundamental principles of Atomic Force Microscopy (AFM).
  • To discuss the theoretical limitations inherent in AFM techniques.
  • To demonstrate the application of AFM for achieving single protein resolution in liquid at room temperature.

Main Methods:

  • Utilizing Atomic Force Microscopy (AFM) for high-resolution imaging.
  • Performing force measurements at the pN to nN scale.
  • Imaging fragile biological samples in a liquid environment with subsecond acquisition times.

Main Results:

  • AFM provides a potent alternative to light microscopy for biological sample analysis.
  • Single protein resolution can be achieved in liquid at room temperature using AFM.
  • Low-force imaging prevents sample disruption and conformational changes, preserving biological integrity.

Conclusions:

  • AFM offers unique insights into enzyme dynamics by enabling high-resolution imaging and force measurements.
  • The technique's ability to image in liquid environments is crucial for studying biological processes in native conditions.
  • Continued technical developments enhance AFM's utility for biophysical research.