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Theory
An electron density map is a representation of a crystal structure based on the diffraction data. The map is constructed by a summation of waves of known phase, amplitude and frequency using Fourier transform. The electron density map of a protein can be viewed along with the pdb structure. The easiest way to view the electron density map is to contour and convert it into a graphical object (mesh).
A figure showing the electron density contours surrounding the ATP molecule in pdb entry 1ATP.
To load an electron density map:
The map will be represented in the ICM Workspace as shown below.
The map can be displayed as shown below however a clearer way of representing the density is to contour the map into a graphical object (mesh) as described in the following section.
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