Provided below are ELISA kits targeting transthyretin, a human protein encoded by TTR. This protein is 147 amino acids long, with a mass of 15.9 kDa, and is a member of the Transthyretin family. This is reported to be a cytoplasmic and secreted protein. There is a noted implication in Amyloidosis, transthyretin-related. Other alias names for this protein include: epididymis luminal protein 111, prealbumin amyloidosis type I, thyroxine-binding prealbumin, ATTR, CTS1, HEL111, and HsT2651. ELISA kits are available that are reactive to human, mouse, rat, bovine, chicken, primate, guinea pig, plant, and other mammalian variants of the target antigen.