Data items in the PDBX_CHEM_COMP_BOND_EDIT category provide bond level editing instructions to be applied to imported chemical components.
loop_ _pdbx_chem_comp_bond_edit.ordinal _pdbx_chem_comp_bond_edit.comp_id _pdbx_chem_comp_bond_edit.edit_op _pdbx_chem_comp_bond_edit.atom_id_1 _pdbx_chem_comp_bond_edit.atom_id_2 1 'LYS' DELETE 'OXT' 'HXT'