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Related Concept Videos

Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
X-ray Crystallography02:18

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
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X-ray Diffraction of Biological Samples

X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
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Related Experiment Video

Updated: May 24, 2026

Sample Preparation and Transfer Protocol for In-Vacuum Long-Wavelength Crystallography on Beamline I23 at Diamond Light Source
10:32

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Published on: April 23, 2021

Multi-wavelength anomalous diffraction using medium-angle X-ray solution scattering (MADMAX).

L Makowski1, J Bardhan, D Gore

  • 1Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts, USA. makowski@ece.neu.edu

Biophysical Journal
|March 6, 2012
PubMed
Summary
This summary is machine-generated.

Anomalous scattering reveals protein dynamics in solution. This technique precisely measures distances between atoms, offering insights into protein motion without crystal constraints.

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Area of Science:

  • Biophysics
  • Structural Biology
  • Biochemistry

Background:

  • Protein function relies on dynamic conformational changes.
  • Studying protein motion in solution is crucial but challenging.
  • Existing methods often require crystal structures, limiting in-solution analysis.

Purpose of the Study:

  • To explore anomalous scattering as a tool for probing protein dynamics in solution.
  • To demonstrate the feasibility of measuring anomalous differences in protein solutions.
  • To provide direct distance information about protein structure and motion.

Main Methods:

  • Theoretical framework for anomalous scattering in protein solutions.
  • Prediction of anomalous differences using atomic coordinate data.
  • Experimental measurement of anomalous differences at the iron K-edge.

Main Results:

  • Anomalous scattering cross-terms are observable in protein solutions.
  • These cross-terms provide direct information on the distance between anomalous centers and the protein's center of mass.
  • Demonstrated successful measurement for myoglobin and hemoglobin solutions.

Conclusions:

  • Anomalous scattering is a viable technique for studying protein structure and dynamics in solution.
  • The method offers a precise molecular ruler, overcoming limitations of crystallography.
  • Further development could enhance the study of complex biological processes in their native state.