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Related Concept Videos

Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.

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Related Experiment Video

Updated: May 14, 2026

Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy
09:37

Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy

Published on: August 15, 2014

Optimized negative-staining protocol for examining lipid-protein interactions by electron microscopy.

Mark Garewal1, Lei Zhang, Gang Ren

  • 1Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|February 14, 2013
PubMed
Summary
This summary is machine-generated.

Determining protein structures at the lipid-binding stage is challenging. An optimized negative-staining electron microscopy (EM) protocol overcomes artifacts, producing near native-state images for structural analysis.

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Visualizing Proteins and Macromolecular Complexes by Negative Stain EM: from Grid Preparation to Image Acquisition
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Visualizing Proteins and Macromolecular Complexes by Negative Stain EM: from Grid Preparation to Image Acquisition

Published on: December 22, 2011

Related Experiment Videos

Last Updated: May 14, 2026

Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy
09:37

Optimized Negative Staining: a High-throughput Protocol for Examining Small and Asymmetric Protein Structure by Electron Microscopy

Published on: August 15, 2014

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy
10:49

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

Visualizing Proteins and Macromolecular Complexes by Negative Stain EM: from Grid Preparation to Image Acquisition
08:01

Visualizing Proteins and Macromolecular Complexes by Negative Stain EM: from Grid Preparation to Image Acquisition

Published on: December 22, 2011

Area of Science:

  • Structural biology
  • Biochemistry
  • Microscopy techniques

Background:

  • Protein-lipid interactions are crucial for biological processes.
  • Understanding protein structure at lipid-binding stages is key to identifying protein functions.
  • Traditional methods like X-ray crystallography struggle with heterogeneous protein-lipid complexes.

Purpose of the Study:

  • To develop an optimized negative-staining (NS) electron microscopy (EM) protocol for studying protein structures at the lipid-binding stage.
  • To overcome artifacts commonly encountered with lipid-related proteins using conventional NS methods.
  • To enable high-resolution structural determination of proteins in their lipid-binding state.

Main Methods:

  • Development and optimization of a negative-staining (NS) electron microscopy (EM) protocol.
  • Validation of the optimized NS protocol by comparing results with cryo-electron microscopy (cryo-EM).
  • Application of the protocol to visualize protein-lipid interactions and particle structures.

Main Results:

  • The optimized NS protocol effectively minimizes artifacts like rouleau formation in lipoproteins.
  • High-contrast, near native-state particle images of proteins in their lipid-binding state were obtained.
  • The protocol is suitable for 3D reconstruction using single-particle analysis and individual-particle electron tomography (IPET).

Conclusions:

  • The optimized NS protocol provides a robust method for examining protein structures at the lipid-binding stage.
  • This technique facilitates the visualization and structural analysis of challenging protein-lipid complexes.
  • The protocol has broad applicability for structural studies of membrane-interacting proteins.