Crystallography map

  • How is an electron density map made?

    To calculate an electron density map, the structure factor amplitudes are combined with corresponding phase estimates (see Box A) in a Fourier series.
    The direct experimental map calculated from the observed structure factor amplitudes (Fo) is relatively difficult to interpret, especially for incomplete models..

  • What does the electron density map show?

    The electron density map derived from the diffraction data is a three dimensional plot that shows wherein space electrons are concentrated within the repeating unit of the crystal.
    The areas of high electron density mark the positions of the protein atoms..

  • What is a difference map in crystallography?

    Fo-Fc is a "difference map".
    It shows where the experimental density and the atomic model disagree.
    If the atomic model fitted the experimental density perfectly (and there was no experimental noise), the difference map would have no densities..

  • Density maps help you identify locations with greater or fewer numbers of data points.
    They are most effective when working with a data set containing many data points where there's substantial overlap between the marks on the map.
  • The electron density map derived from the diffraction data is a three dimensional plot that shows wherein space electrons are concentrated within the repeating unit of the crystal.
    The areas of high electron density mark the positions of the protein atoms.
Crystallography Produces Electron Density Maps The crystallographer fits the atoms of the known molecules into the electron density map, and refines the model and map to the limits of the resolution of the crystal (which is limited by the level of order or disorder in the crystal).
In X-ray crystallography, electrons in a crystal interact with x-rays to generate a diffraction pattern. Then crystallographers work backwards from the diffraction patterns to create an electron density map. Then they build an atomic model into that map.
The omit map will show features even in regions where no model has been built yet
In mathematics, the Abel–Jacobi map is a construction of algebraic geometry which relates an algebraic curve to its Jacobian variety.
In Riemannian geometry, it is a more general construction mapping a manifold to its Jacobi torus.
The name derives from the theorem of Abel and Jacobi that two effective divisors are linearly equivalent if and only if they are indistinguishable under the Abel–Jacobi map.

Categories

Crystallography material
Crystallography martensite
Crystallography maximum entropy
Macromolecular crystallography
Maud crystallography
Nano crystallography
Crystallographic names
Crystallography in nanotechnology
Crystallography of nanomaterials
Crystallography parameters
Crystallography patterns
Crystallography parameter definition
Crystallography pay rate
Crystallographic parameters
Crystallographic parameters in kmno4 are
Pandda crystallography
Crystallographic patterns
Patterson crystallography
Parrot crystallography
Crystallographic packing efficiency