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Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

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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.
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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...
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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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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A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering
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Structural Studies of Macromolecules in Solution using Small Angle X-Ray Scattering

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Small-angle scattering and 3D structure interpretation.

Jill Trewhella1

  • 1The University of Sydney, New South Wales 2006, Australia.

Current Opinion in Structural Biology
|June 3, 2016
PubMed
Summary
This summary is machine-generated.

Solution small-angle scattering (SAS) advances structural analysis of biomolecules. Neutron scattering with contrast variation offers enhanced information for hybrid modeling, alongside progress in data sharing and reporting frameworks.

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Area of Science:

  • Structural Biology
  • Biophysics
  • Biochemistry

Background:

  • Small-angle scattering (SAS) is crucial for analyzing biomolecular structures in solution.
  • Understanding the architecture of biomolecular complexes is essential for deciphering their function.

Purpose of the Study:

  • To review recent advancements in applying solution small-angle scattering (SAS) for biomolecular structural analysis.
  • To highlight the synergistic use of X-ray and neutron SAS in integrative modeling approaches.
  • To emphasize the value of neutron scattering with contrast variation for increased information content.

Main Methods:

  • Application of X-ray and neutron small-angle scattering (SAS).
  • Utilizing SAS data within hybrid and integrative modeling frameworks.
  • Employing neutron scattering with contrast variation for enhanced structural insights.

Main Results:

  • SAS provides unique contributions to determining the structure of biomolecules and their complexes.
  • Integrative modeling benefits significantly from combining SAS data with other structural information.
  • Neutron scattering with contrast variation yields higher information content for detailed structural analysis.

Conclusions:

  • Advancements in SAS techniques are expanding the scope of structural biology.
  • Standardized reporting frameworks and open data archives are vital for reproducibility and collaborative research.
  • SAS, particularly neutron scattering, is an indispensable tool for modern structural biology and integrative modeling.