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Related Concept Videos

Electron Microscope Tomography and Single-particle Reconstruction01:07

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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Cryo-electron Microscopy01:28

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Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
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Updated: Nov 24, 2025

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition
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Getting Started with In Situ Cryo-Electron Tomography.

Daniel Serwas1, Karen M Davies2,3

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA. daniel.serwas@berkeley.edu.

Methods in Molecular Biology (Clifton, N.J.)
|December 28, 2020
PubMed
Summary

Cryo-electron tomography (cryo-ET) offers high-resolution imaging of cellular structures without artifacts. This guide simplifies cryo-ET sample preparation and data processing for cell biologists to analyze protein structures and cell morphology.

Keywords:
Cell biologyCellular morphologyCryo-electron tomographyMammalian cellsSegmentationStructural cell biologyTilt seriesVitrification

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Area of Science:

  • Cell Biology
  • Structural Biology
  • Microscopy

Background:

  • Cryo-electron tomography (cryo-ET) provides near-native imaging of cellular components at high resolution.
  • Unlike traditional methods, cryo-ET avoids artifact-inducing agents for sample fixation and visualization.
  • Widespread adoption by cell biologists is limited due to complex protocols and data processing challenges.

Purpose of the Study:

  • To provide a simplified protocol for cryo-electron tomography (cryo-ET) using mammalian cells.
  • To guide researchers through essential sample preparation, data recording, and processing steps.
  • To enable morphological and structural analysis of biological specimens in their native cellular context.

Main Methods:

  • Detailed protocol for mammalian cell sample preparation for cryo-ET.
  • Step-by-step guidance on data recording procedures.
  • Basic data processing techniques for cryo-electron tomography data.

Main Results:

  • The protocol enables acquisition of data suitable for morphological analysis and precise measurements.
  • Generated data supports detailed structural investigations, including subtomogram averaging.
  • Researchers can determine the structure of proteins within their cellular environment.

Conclusions:

  • This chapter demystifies cryo-ET by offering a foundational protocol for cell biologists.
  • The presented methods facilitate the study of cellular structures and protein organization.
  • Simplified cryo-ET workflows can enhance the analysis of cellular ultrastructure and molecular machinery.