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Assessing Two-dimensional Crystallization Trials of Small Membrane Proteins for Structural Biology Studies by Electron Crystallography

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Design guidelines for an electron diffractometer for structural chemistry and structural biology.

Jonas Heidler¹, Radosav Pantelic², Julian T C Wennmacher¹

¹Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.

Acta Crystallographica. Section D, Structural Biology

|May 8, 2019

Summary

This summary is machine-generated.

This study details a new setup for 3D electron diffraction, combining a transmission electron microscope with an EIGER detector. This enables productive structure determination for chemical compounds, overcoming current instrumentation limitations.

Keywords:

3D electron diffraction EIGER X 1M detector EIGER hybrid pixel detector chemical crystallography electron diffractometer structural chemistry

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Single Particle Cryo-Electron Microscopy: From Sample to Structure

Single Particle Cryo-Electron Microscopy: From Sample to Structure

Published on: May 29, 2021

Area of Science:

Crystallography
Materials Science
Chemistry

Background:

3D electron diffraction is a powerful technique for solving chemical compound structures.
Current instrumentation, primarily transmission electron microscopes, is not optimized for diffraction studies, leading to inefficiencies.
Dedicated electron diffractometers for rotation methods are currently unavailable.

Purpose of the Study:

To describe the construction and calibration of a productive electron diffractometer using a transmission electron microscope and an EIGER hybrid pixel detector.
To provide a workaround for productive data collection in chemical crystallography until fully integrated systems are developed.

Main Methods:

Integration of an EIGER hybrid pixel detector with a transmission electron microscope.
System calibration to ensure rapid access to experimental parameters for diffraction data processing.

Main Results:

A functional electron diffractometer setup was successfully constructed.
The system allows for productive and efficient operation in chemical crystallography.
The setup overcomes limitations of using imaging-optimized microscopes for diffraction.

Conclusions:

The described setup offers a productive solution for 3D electron diffraction structure determination.
This approach enhances efficiency in chemical crystallography research.
It serves as a viable alternative until dedicated electron diffractometers become commercially available.