Anti-GSTT4 antibodies are used in the immunodetection of the protein glutathione S-transferase theta 4. In humans, the canonical protein has a reported length of 241 amino acid residues and a mass of 27.9 kDa. Its subcellular localization is in the cytoplasm. A member of the Theta protein family, GSTT4 is known to be involved with metabolic processes. Synonyms for this target antigen include HS322B1A, GST class-theta-4, glutathione S-transferase theta pseudogene 1, and GSTTP1.