GSTZ1, also known as maleylacetoacetate isomerase, is an enzyme that belongs to glutathione S-transferase (GSTs) super-family. This enzyme acts by catalyzing the reaction of glutathione with an acceptor molecule to form an S-substituted glutathione (S=sulfur). The reactions utilizing glutathione contribute the transformation of a wide variety of electrophiles, including reactive products of lipid, protein, carcinogens, therapeutic drugs, environmental toxins, and products of oxidative stress. It also plays a significant role in the catabolism of phenylalanine and tyrosine. Recombinant GSTZ1 protein was expressed in E.coli and purified by using conventional chromatography techniques. Synonyms: GSTZ1-1, MAAI, MAI, Glutathione S-transferase zeta 1 EC 2.5.1.18, EC 5.2.1.2, Glutathione S transferase zeta 1, Glutathione S-Transferase Zeta-1. NCBI no.: AAC33591