XmlmmCIF equivalent: chem_comp_tor Data items in the CHEM_COMP_TOR category record details about the torsion angles in a chemical component. As torsion angles can have more than one target value, the target values are specified in the CHEM_COMP_TOR_VALUE category. XmlmmCIF equivalent: chem_comp_tor/atom_id_1 The id of the first of the four atoms that define the torsion angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_tor/atom_id_2 The id of the second of the four atoms that define the torsion angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_tor/atom_id_3 The id of the third of the four atoms that define the torsion angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_tor/atom_id_4 The id of the fourth of the four atoms that define the torsion angle. This data item is a pointer to _chem_comp_atom.atom_id in the CHEM_COMP_ATOM category. XmlmmCIF equivalent: chem_comp_tor/comp_id This data item is a pointer to _chem_comp.id in the CHEM_COMP category. XmlmmCIF equivalent: chem_comp_tor/id The value of _chem_comp_tor.id must uniquely identify a record in the CHEM_COMP_TOR list.