Coordinate Section

The Coordinate Section contains the collection of atomic coordinates as well as the MODEL and ENDMDL records.

ATOM/HETATM

The ATOM records present the atomic coordinates for standard residues. They also present the occupancy and temperature factor for each atom. Non-polymer chemical coordinates use the HETATM record type. The element symbol is always present on each ATOM record; segment identifier and charge are optional.

The character/column format of the ATOM/HETATM records is not changed. Changes in ATOM/HETATM records result from the standardization atom and residue nomenclature. This nomenclature is described in electronic form in the PDB Chemical Components Dictionary, which may be downloaded at http://remediation.wwpdb.org/downloads/Components-rel-alt.cif.