Multiple Occupancy
A presence of two or more sets of coordinates for the same atom/residue in the PDB file is due to the experimental electron density map interpretation, where electron density can be observed in different space positions for certain atoms.
Placing the cursor above this element: pop-up area will show the position
(sequence number and amino acid three letter code) for selected amino
acid and the ratio of the occupancy by each of the identified space positions
for given amino acid.
Left mouse click: no action
Right mouse
click: on any of the "Multiple Occupancy" will generate
following menu and actions:
See the legend for the
interpretation of the color code used for Multiple occupancy.
Figure below shows the event reported by the JPDs Multiple occupancy, both in the PDB file and 3D representation.
4ltz.pdb
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