This book brings together work from leading researchers to present the most recent advances in research on metallothionein. This protein interests toxicologists because it is thought that metallothionein protects against metal toxicity and possibly against oxidative stress. It is of interest to pharmacologists because modification of metallothionein levels might have a role in cancer chemotherapy. Nutritionists have an interest in this protein because it appears to be a major storage protein for zinc. Biochemists and molecular biologists will be interested in the mechanisms of regulation of this protein because it is extremely inducible.