Data items in the PDBX_CHEM_COMP_ATOM_EDIT category provide atom level editing instructions to be applied to imported chemical components.
loop_ _pdbx_chem_comp_atom_edit.ordinal _pdbx_chem_comp_atom_edit.comp_id _pdbx_chem_comp_atom_edit.edit_op _pdbx_chem_comp_atom_edit.atom_id 1 'LYS' DELETE 'HN2'