Macromolecular dictionary (mmCIF) version 2.0.09
_chem_link_tor.atom_id_4
Name:'_chem_link_tor.atom_id_4'
Definition:
The ID of the fourth of the four atoms that define the torsion angle. As this data item does not point to a specific atom in a specific chemical component, it is not a child in the linkage sense.
Type: code
Mandatory item: yes