Crystallographic Information Framework

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Macromolecular dictionary (mmCIF) version 2.0.09

_geom_torsion.atom_site_auth_comp_id_1

Name:
'_geom_torsion.atom_site_auth_comp_id_1'

Definition:

   An optional identifier of the first of the four atom sites that
   define the torsion angle.

   This data item is a pointer to _atom_site.auth_comp_id in the
   ATOM_SITE category.

Mandatory item: no