Macromolecular dictionary (mmCIF) version 2.0.09
_geom_bond.atom_site_id_1
Name:'_geom_bond.atom_site_id_1'
Definition:
The identifier of the first of the two atom sites that define the bond. This data item is a pointer to _atom_site.id in the ATOM_SITE category.
Mandatory item: yes
Alias:_geom_bond_atom_site_label_1 (cif_core.dic version 2.0.1)