Problem- Zinc in its 2+ oxidation state is an essential metal ion for life. Zn2+ is found bound to many proteins that are involved in biological processes, but unfortunately Zn2+ is hard to detect by common chemical methods. Therefore, scientists who are interested in studying Zn2+-containing proteins will frequently substitute Cd2+ for Zn2+, since Cd2+ is easier to detect. Proteins that speed up (catalyze) chemical reactions are called enzymes. Many enzymes are required for proper metabolic reactions in the body. One problem with using Cd2+ to replace Zn2+ in enzymes is that Cd2+ substitution can decrease or even eliminate enzymatic activity. Can you suggest a different metal ion that might replace Zn2+ in enzymes instead of Cd2+? Proteins that speed up (catalyze) chemical reactions are called enzymes. Many enzymes are required for proper metabolic reactions in the body. One problem with using to replace in enzymes is that substitution can decrease or even eliminate enzymatic activity. Can you suggest a different metal ion that might replace in enzymes instead of ? Cu+ Ti4+ Db5+ Ce3+
If possible just a brief explanation how you got the answer?