Macromolecular dictionary (mmCIF) version 2.0.09
A value that should be taken as a potential target value for the torsion angle associated with the specified atoms, expressed as the distance between the atoms specified by _chem_comp_tor.atom_id_1 and _chem_comp_tor.atom_id_4 in the referenced record in the CHEM_COMP_TOR list. Note that the torsion angle cannot be fully specified by a distance (for instance, a torsion angle of -60 degree will yield the same distance as a 60 degree angle). However, the distance specification can be useful for refinement in situations in which the angle is already close to the desired value.
Type conditions: esd
Mandatory item: no
The permitted range is [0.0, infinity)
Related item: _chem_comp_tor_value.dist_esd (associated_esd)