RESIDUE 1CU 4 CONECT CU 1 O1 CONECT O1 3 CU HO11 HO12 CONECT HO11 1 O1 CONECT HO12 1 O1 END HET 1CU 4 HETNAM 1CU COPPER ION, 1 WATER COORDINATED FORMUL 1CU Cu1 H2 O1 2+