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Related Experiment Video

Updated: Feb 5, 2026

$Microcrystal Electron Diffraction of Small Molecules$

Microcrystal Electron Diffraction of Small Molecules

Published on: March 15, 2021

Machining protein microcrystals for structure determination by electron diffraction.

Helen M E Duyvesteyn^1,2, Abhay Kotecha^1,3, Helen M Ginn^1,2

¹Division of Structural Biology, University of Oxford, Headington, Oxford OX3 7BN, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America

|September 2, 2018

Summary

This summary is machine-generated.

Ion-beam milling of frozen protein crystals preserves near-atomic resolution, enabling protein structure determination. This technique bridges size gaps for electron diffraction and microfocus beamlines, potentially analyzing vitrified cells.

Keywords:

FIB diffraction electron crystallography protein crystal structure

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Last Updated: Feb 5, 2026

$Microcrystal Electron Diffraction of Small Molecules$

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Published on: March 15, 2021

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Area of Science:

Structural biology
Materials science
Biophysics

Background:

Determining protein structures is crucial for understanding biological functions.
Existing methods for protein structure determination have limitations in crystal size requirements.
Bridging the gap between nanoscale electron diffraction and microscale synchrotron methods is needed.

Purpose of the Study:

To demonstrate ion-beam milling as a viable method for preparing frozen, hydrated protein crystals for structure determination.
To assess the preservation of crystal lattice integrity at near-atomic resolution after milling.
To explore the potential of ion-beam milling for analyzing vitrified biological samples.

Main Methods:

Ion-beam milling of frozen, hydrated protein crystals to create thin lamella.
Analysis of the crystal lattice preservation using high-resolution imaging techniques.
Comparison of crystal quality with conventional electron diffraction and synchrotron microfocus beamline requirements.

Main Results:

Ion-beam milling successfully produced thin lamella from frozen, hydrated protein crystals.
The crystal lattice was preserved to near-atomic resolution after milling.
The technique effectively bridges the size gap between nanometer-scale electron diffraction and micron-scale synchrotron methods.

Conclusions:

Ion-beam milling is a promising technique for preparing samples for protein structure determination.
The method preserves atomic information, suggesting broader applications in structural biology.
This approach could enable detailed analysis of sections from vitrified cells, advancing structural studies.