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Updated: Jun 25, 2026

Preparation and Observation of Thick Biological Samples by Scanning Transmission Electron Tomography
Published on: March 12, 2017
ECM macromolecules: rotary shadowing and transmission electron microscopy.
Michael J Sherratt1, Roger S Meadows, Helen K Graham
1The University of Manchester, Oxford Road, Manchester, M13 9PT, UK. michael.j.sherratt@manchester.ac.uk
Rotary shadowing electron microscopy uses heavy metal evaporation for high-resolution imaging of macromolecules. This technique is valuable for studying extracellular matrix components like collagens and glycoproteins.
Area of Science:
- Biophysics
- Materials Science
- Structural Biology
Background:
- Conventional electron microscopy uses heavy metal stains in solution for macromolecule visualization.
- Rotary shadowing involves evaporating heavy metals onto surface-adsorbed molecules.
Purpose of the Study:
- To highlight the utility of high-resolution shadowing for characterizing extracellular matrix macromolecules.
- To emphasize the value of rotary shadowing electron microscopy in structural biology.
Main Methods:
- Rotary shadowing electron microscopy.
- Surface adsorption of macromolecules.
- Heavy metal evaporation.
Main Results:
- High-resolution visualization of macromolecules is achieved.
- Characterization of extracellular matrix components is enabled.
- Fibrillar collagens, microfibrillar elements, and glycoproteins can be studied.
Conclusions:
- High-resolution shadowing is a valuable technique for electron microscopy.
- The method is particularly effective for extracellular matrix macromolecules.
- It provides detailed structural insights into complex biological assemblies.
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