Crystallographic Information Framework

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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_link_tor.atom_id_1 and _chem_link_tor.atom_id_4 in the
   referenced record in the CHEM_LINK_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: float

Type conditions: esd

Mandatory item: no

The permitted range is [0.0, infinity)

Related item: _chem_link_tor_value.dist_esd (associated_esd)

Category: chem_link_tor_value