Data Category atom_sites_alt
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General 
- Category name
- atom_sites_alt
- Required in PDB entries
- no
- Category group membership
- atom_group
- Used in current PDB entries
- Yes, in about 0.2 % of entries
Category Relationship Diagrams 
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Category Description
Data items in the ATOM_SITES_ALT category record details
about the structural ensembles that should be generated from
atom sites or groups of atom sites that are modelled in
alternative conformations in this data block.
Category Example
loop_
_atom_sites_alt.id
_atom_sites_alt.details
.
; Atom sites with the alternative ID set to null are not
modeled in alternative conformations
;
1
; Atom sites with the alternative ID set to 1 have been
modeled in alternative conformations with respect to atom
sites marked with alternative ID 2. The conformations of
amino-acid side chains and solvent atoms with alternative
ID set to 1 correlate with the conformation of the
inhibitor marked with alternative ID 1. They have been
given an occupancy of 0.58 to match the occupancy assigned
to the inhibitor.
;
2
; Atom sites with the alternative ID set to 2 have been
modeled in alternative conformations with respect to atom
sites marked with alternative ID 1. The conformations of
amino-acid side chains and solvent atoms with alternative
ID set to 2 correlate with the conformation of the
inhibitor marked with alternative ID 2. They have been
given an occupancy of 0.42 to match the occupancy assigned
to the inhibitor.
;
3
; Atom sites with the alternative ID set to 3 have been
modeled in alternative conformations with respect to
atoms marked with alternative ID 4. The conformations of
amino-acid side chains and solvent atoms with alternative
ID set to 3 do not correlate with the conformation of the
inhibitor. These atom sites have arbitrarily been given
an occupancy of 0.50.
;
4
; Atom sites with the alternative ID set to 4 have been
modeled in alternative conformations with respect to
atoms marked with alternative ID 3. The conformations of
amino-acid side chains and solvent atoms with alternative
ID set to 4 do not correlate with the conformation of the
inhibitor. These atom sites have arbitrarily been given
an occupancy of 0.50.
;
