Cadmium is a non essential trace metal, the increasing amount of which can be detrimental to the health. Once the cadmium level is elevated in the blood, it remains high even when its source is depleted. There is a need to remove the metal from the environment so our food, air or water is not contaminated by it. Metallothioneins (MTs) are metal binding proteins that are rich in cysteine residues constituting 30% of the total protein. The thiol groups bind to the metal ions. Different organisms such as bacteria, protozoa and mammals like humans have shown increased production of MTs with...