Anti-TSH2 antibodies enable researchers to detect and measure the TSH2 antigen in biological samples. This target is a reported synonym of the THNSL2 gene, which encodes threonine synthase like 2. This protein is known to act as a catabolic phospho-lyase on both gamma- and beta-phosphorylated substrates. The human version of TSH2 has a canonical amino acid length of 484 residues and a protein mass of 54.1 kilodaltons, although 5 isoforms have been identified. It is reported to be a secreted protein that is notably expressed in many tissues, such as the cerebral cortex, tonsil, and appendix. TSH2 is a member of the Threonine synthase protein family.