loop_ _pdbx_virtual_torsion.atom_site_id_1 _pdbx_virtual_torsion.atom_site_id_2 _pdbx_virtual_torsion.atom_site_id_3 _pdbx_virtual_torsion.atom_site_id_4 _pdbx_virtual_torsion.model_id _pdbx_virtual_torsion.value _pdbx_virtual_torsion.site_symmetry_1 _pdbx_virtual_torsion.site_symmetry_2 _pdbx_virtual_torsion.site_symmetry_3 _pdbx_virtual_torsion.site_symmetry_4 1 2 5 9 1 71.8 1_555 1_555 1_555 1_555