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An Information Portal to Biological Macromolecular Structures |
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Dictionary Resources Home | Dictionary | Category Groups | Categories | Items | Data |
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Category em_map 
Category Description
Data items in the EM_MAP category record details
about the type of the 3d-em map. The map is represented
logically as a three-dimensional array of data-values
of the same data-type. To interpret the contents of of a 3d-map file
it is necessary to know the data-type of the array and the size of the
array in three dimensions (i.e.the number of columns, rows and sections).
In a 1d-array representation columns are the fastest changing, followed by
rows and sections. The first element of the array will have index 0.
The 3d-em map is in a defined orientation/position in Universal 3D Space.
This space is described by a right-handed cartesian coordinate system
(and is the same coordinate system as that used for structures deposited
in the PDB).
Category Examples 
Example 1: Example 1 - based on PDB entry 1DYL and laboratory records for the
structure corresponding to PDB entry 1DYL
_em_map.id 1 _em_map.pdb_entry_id 1DYL _em_map.entry_id EM9999 _em_map.num_columns 100 _em_map.num_rows 100 _em_map.num_sections 100 _em_map.num_spacing_x 2.0 _em_map.num_spacing_y 2.0 _em_map.num_spacing_z 2.0 _em_map.details . _em_map.value_density_max . _em_map.value_density_min . _em_map.value_density_mean .
Key Category Items 
Items in Category em_map