GSTM3 belongs to the glutathione s-transferase（GST) family of proteins. There are eight GST proteins families， named alpha， kappa， mu， omega， pi， sigma， theta and zeta. Each one of the GST families has several proteins with different functions throughout the cell. The mu type of enzymes takes part in the detoxification of electrophilic compounds， including therapeutic drugs， carcinogens， environmental toxins and products of oxidative stress， by conjugation with glutathione.
