XmlmmCIF equivalent: chem_comp_angle Data items in the CHEM_COMP_ANGLE category record details about angles in a chemical component. Angles are designated by three atoms, with the second atom forming the vertex of the angle. Target values may be specified as angles in degrees, as a distance between the first and third atoms, or both. XmlmmCIF equivalent: chem_comp_angle/value_angle The value that should be taken as the target value for the angle associated with the specified atoms, expressed in degrees. XmlmmCIF equivalent: chem_comp_angle/value_angle_esd The estimated standard deviation of _chem_comp_angle.value_angle. XmlmmCIF equivalent: chem_comp_angle/value_dist The value that should be taken as the target value for the angle associated with the specified atoms, expressed as the distance between the atoms specified by _chem_comp_angle.atom_id_1 and _chem_comp_angle.atom_id_3. XmlmmCIF equivalent: chem_comp_angle/value_dist_esd The estimated standard deviation of _chem_comp_angle.value_dist_esd. XmlmmCIF equivalent: chem_comp_angle/comp_id This data item is a pointer to _chem_comp.id in the CHEM_COMP category. XmlmmCIF equivalent: chem_comp_angle/atom_id_1 The id of the first of the three atoms that define the angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_angle/atom_id_2 The id of the second of the three atoms that define the angle. The second atom is taken to be the apex of the angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_angle/atom_id_3 The id of the third of the three atoms that define the angle. This data item is a pointer to _chem_comp_atom.atom_id in the chem_comp_atom category.