# data_comp_list loop_ _chem_comp.id _chem_comp.three_letter_code _chem_comp.name _chem_comp.group _chem_comp.number_atoms_all _chem_comp.number_atoms_nh _chem_comp.desc_level MG . 'magnesium ' non-polymer 1 1 . # data_comp_MG # loop_ _chem_comp_atom.comp_id _chem_comp_atom.atom_id _chem_comp_atom.type_symbol _chem_comp_atom.type_energy _chem_comp_atom.partial_charge MG MG MG MG 0.000 loop_ _chem_comp_tree.comp_id _chem_comp_tree.atom_id _chem_comp_tree.atom_back _chem_comp_tree.atom_forward _chem_comp_tree.connect_type MG MG n/a . END