XmlmmCIF equivalent: geom_torsion Data items in the GEOM_TORSION category record details about molecular and crystal torsion angles, as calculated from the contents of the ATOM, CELL, and SYMMETRY data. The vector direction _geom_torsion.atom_site_id_2 to _geom_torsion.atom_site_id_3 is the viewing direction, and the torsion angle is the angle of twist required to superimpose the projection of the vector site2-site1 onto the projection of the vector site3-site4. Clockwise torsions are positive, anticlockwise torsions are negative. Ref: Klyne, W. & Prelog, V. (1960). Experientia, 16, 521-523. XmlmmCIF equivalent: geom_torsion/atom_site_auth_asym_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_asym_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_asym_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_asym_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_atom_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_atom_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_atom_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_atom_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_comp_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_comp_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_comp_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_comp_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_seq_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_seq_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_seq_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_auth_seq_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.auth_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_alt_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_alt_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_alt_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_alt_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_alt_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_alt_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_alt_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_alt_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_asym_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_asym_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_asym_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_asym_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_asym_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_atom_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_atom_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_atom_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_atom_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_atom_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_comp_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_comp_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_comp_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_comp_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_comp_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_seq_id_1 An optional identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_seq_id_2 An optional identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_seq_id_3 An optional identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_label_seq_id_4 An optional identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.label_seq_id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/pdbx_PDB_model_num Pointer to _atom_site.pdbx_PDB_model_num XmlmmCIF equivalent: geom_torsion/pdbx_atom_site_PDB_ins_code_1 Pointer to _atom_site.pdbx_PDB_ins_code. XmlmmCIF equivalent: geom_torsion/pdbx_atom_site_PDB_ins_code_2 Pointer to _atom_site.pdbx_PDB_ins_code. XmlmmCIF equivalent: geom_torsion/pdbx_atom_site_PDB_ins_code_3 Pointer to _atom_site.pdbx_PDB_ins_code. XmlmmCIF equivalent: geom_torsion/pdbx_atom_site_PDB_ins_code_4 Pointer to _atom_site.pdbx_PDB_ins_code. XmlmmCIF equivalent: geom_torsion/publ_flag This code signals if the torsion angle is referred to in a publication or should be placed in a table of significant torsion angles. XmlmmCIF equivalent: geom_torsion/value The value of the torsion angle in degrees. XmlmmCIF equivalent: geom_torsion/value_esd The estimated standard deviation of _geom_torsion.value. XmlmmCIF equivalent: geom_torsion/atom_site_id_1 The identifier of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_id_2 The identifier of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_id_3 The identifier of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/atom_site_id_4 The identifier of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value. This data item is a pointer to _atom_site.id in the ATOM_SITE category. XmlmmCIF equivalent: geom_torsion/site_symmetry_1 The symmetry code of the first of the four atom sites that define the torsion angle specified by _geom_torsion.value. XmlmmCIF equivalent: geom_torsion/site_symmetry_2 The symmetry code of the second of the four atom sites that define the torsion angle specified by _geom_torsion.value. XmlmmCIF equivalent: geom_torsion/site_symmetry_3 The symmetry code of the third of the four atom sites that define the torsion angle specified by _geom_torsion.value. XmlmmCIF equivalent: geom_torsion/site_symmetry_4 The symmetry code of the fourth of the four atom sites that define the torsion angle specified by _geom_torsion.value.