1. Hughes, M. N. The Inorganic Chemistry of Biological Processes19722nd ed.New YorkWiley150
2. Metal Ions in Proteins: Structural and Functional Roles
3. Creighton, T. E. Proteins: Structure and Molecular Properties19932nd ed.New YorkFreeman507507
4. Bertini, I.; Gray, H. B.; Lippard, S. J.; Valentine, J. S. Bioinorganic Chemistry1994Mill Valley, CaUniversity Science Book107166
5. Baker, W. C.; Ketcham, L. K.; Dayhoff, M. O.Dayhoff, M. O. Atlas of Protein Sequence and Structure, vol. 51965Silver Spring, MDNational Biomedical Research Foundation1350