Anti-STH antibodies are used in the immunodetection of the protein saitohin. In humans, the canonical protein has a reported length of 128 amino acid residues and a mass of 13.7 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is reported to be highly expressed in the placenta, muscle, fetal brain, and adult brain, with lower expression in the heart, kidney, stomach, testis, and adrenal gland. Synonyms for this target antigen include microtubule-associated protein tau (MAPT) intronic transcript. These STH antibodies are widely used in Western Blot experiments, among other applications.