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X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

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Related Experiment Video

Updated: Jun 30, 2025

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Published on: May 27, 2021

Molecular interactions with bilayer membrane stacks using neutron and X-ray diffraction.

Saffron J Bryant¹, Christopher J Garvey², Tamim A Darwish³

¹School of Science, College of STEM, RMIT University, Melbourne, Australia.

Advances in Colloid and Interface Science

|March 22, 2024

Summary

This summary is machine-generated.

Neutron and X-ray diffraction reconstruct lamellar unit cells, revealing molecular positions and interactions within membranes. Molecular deuteration enhances this model-independent technique for high-resolution structural insights.

Keywords:

Bilayer interactions Deuteration Neutron diffraction X-ray diffraction

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Area of Science:

Membrane biophysics
Structural biology
Materials science

Background:

Lamellar unit cell reconstruction is key to understanding molecular arrangements in bilayers.
Molecular deuteration combined with diffraction offers high-resolution structural data.

Purpose of the Study:

To review neutron and X-ray diffraction techniques for probing bilayer structures.
To highlight their utility in determining molecular positions and interactions.

Main Methods:

Neutron diffraction with contrast variation of the water layer.
X-ray diffraction with intuitive phase problem solutions.
Fourier reconstruction of the unit cell.

Main Results:

Model-independent determination of scattering length density profiles.
Insights into molecular locations, orientations, and interactions within lipid bilayers.
Detailed understanding of cryoprotectants, viral proteins, drugs, and stratum corneum structure.

Conclusions:

These complementary techniques provide high-resolution, model-independent structural information about lipid bilayers.
They are crucial for understanding membrane interactions with various biomolecules and compounds.