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Variations on Negative Stain Electron Microscopy Methods: Tools for Tackling Challenging Systems.

Charlotte A Scarff1, Martin J G Fuller2, Rebecca F Thompson2

  • 1Astbury Centre for Structural Molecular Biology, University of Leeds.

Journal of Visualized Experiments : Jove
|February 15, 2018
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Summary
This summary is machine-generated.

Negative stain electron microscopy (EM) offers a quick way to view macromolecules. Optimizing sample preparation and staining techniques is crucial for high-quality results in negative stain EM.

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Area of Science:

  • Structural biology
  • Biophysics
  • Microscopy

Background:

  • Negative stain electron microscopy (EM) is a valuable technique for observing macromolecules and their complexes.
  • While limited in resolution (~18-20 Å), it provides rapid sample assessment for cryo-electron microscopy (cryo-EM).

Purpose of the Study:

  • To detail optimized protocols for negative stain EM.
  • To highlight the impact of varying techniques on sample preparation and results.
  • To introduce novel staining reagents.

Main Methods:

  • Detailed protocols for two substrate preparation methods.
  • Three distinct grid washing and blotting techniques.
  • Preparation of common and novel Lanthanide-based negative stains.

Main Results:

  • Demonstration of how sample behavior varies significantly with different staining conditions.
  • Provision of practical protocols for achieving high-quality negative stain EM.
  • Characterization of two new Lanthanide-based stains.

Conclusions:

  • Negative stain EM requires a case-by-case approach to technique selection.
  • Access to diverse preparation and staining methods is essential for optimal results.
  • The study provides practical guidance and novel reagents for advancing negative stain EM applications.