Index

Macromolecular dictionary (mmCIF) version 2.0.09

_atom_site.id

Definition:

   The value of _atom_site.id must uniquely identify a record in the
   ATOM_SITE list.

   Note that this item need not be a number; it can be any unique
   identifier.

   This data item was introduced to provide compatibility between
   small-molecule and macromolecular CIFs. In a small-molecule
   CIF, _atom_site_label is the identifier for the atom. In a
   macromolecular CIF, the atom identifier is the aggregate of
   _atom_site.label_alt_id, _atom_site.label_asym_id,
   _atom_site.label_atom_id, _atom_site.label_comp_id and
   _atom_site.label_seq_id. For the two types of files to be
   compatible, a formal identifier for the category had to be
   introduced that was independent of the different modes of
   identifying the atoms. For compatibility with older CIFs,
   _atom_site_label is aliased to _atom_site.id.

Type: code

Mandatory item: yes

Category: atom_site