Glutathione S-transferase (GST) isoenzymes are an important superfamily of proteins that are present in homodimer or heterodimer structures. The isoenzymes included in this superfamily are involved in endobiotic and xenobiotic detoxification systems in animals, plants and microorganisms. This compilation focuses on the importance of functional aspects of polymorphic variants in different populations so the risk genotypes can be identified as indicators of disease susceptibility. Genetic studies will help to develop prognostic biomarkers for early prediction and risk assessment in patients,...