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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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Related Experiment Video

Updated: Jun 17, 2026

Xenopus laevis Egg Extract Preparation and Live Imaging Methods for Visualizing Dynamic Cytoplasmic Organization
05:58

Xenopus laevis Egg Extract Preparation and Live Imaging Methods for Visualizing Dynamic Cytoplasmic Organization

Published on: June 6, 2021

Observing Xenopus laevis oocyte plasma membrane by Atomic Force Microscopy.

Francesco Orsini1, Massimo Santacroce, Paolo Arosio

  • 1Dipartimento di Scienze Molecolari Applicate ai Biosistemi, Università degli Studi di Milano, Milano, Italy. francesco.orsini@unimi.it

Methods (San Diego, Calif.)
|December 10, 2009
PubMed
Summary

Atomic Force Microscopy (AFM) visualized protein complexes in Xenopus laevis oocyte plasma membranes. This technique revealed distinct protein arrangements, offering insights into native membrane organization.

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Area of Science:

  • Biophysics
  • Cell Biology
  • Surface Science

Background:

  • The Xenopus laevis oocyte plasma membrane is a complex structure crucial for cellular functions.
  • Understanding the native organization of protein complexes within this membrane is vital for cell biology research.

Purpose of the Study:

  • To investigate the plasma membrane of Xenopus laevis oocytes using Atomic Force Microscopy (AFM).
  • To characterize the structural organization and distribution of protein complexes on both external and intracellular sides of the oocyte plasma membrane.

Main Methods:

  • Utilized Atomic Force Microscopy (AFM) for high-resolution imaging of the oocyte plasma membrane.
  • Developed and optimized sample preparation protocols for both external and intracellular AFM investigations.
  • Employed ultracentrifugation on sucrose gradients for plasma membrane purification.

Main Results:

  • Achieved reproducible AFM images, enabling visualization and dimensional characterization of membrane proteins.
  • Identified two distinct protein complex arrangements: heterogeneous/irregular distribution and ordered hexagonal packing within nanometer-sized domains.
  • Demonstrated the capability to study protein complexes in their native eukaryotic membrane environment.

Conclusions:

  • Atomic Force Microscopy (AFM) is a powerful tool for the structural characterization of proteins in native biological membranes.
  • AFM provides valuable insights into the spatial organization and arrangement of protein complexes within the Xenopus laevis oocyte plasma membrane.
  • The study establishes AFM's relevance for exploring protein organization in native eukaryotic membranes.