Anti-HYI antibodies are used in the immunodetection of the protein hydroxypyruvate isomerase (putative). In humans, the canonical protein has a reported length of 277 amino acid residues and a mass of 30.4 kDa. Up to 4 different isoforms have been reported for this protein. It is notably widely expressed in many tissue types. A member of the Hyi protein family, HYI is known to catalyze the reversible isomerization between hydroxypyruvate and 2-hydroxy-3-oxopropanoate (also termed tartronate semialdehyde). Synonyms for this target antigen include endothelial cell apoptosis protein E-CE1, hydroxypyruvate isomerase homolog, and putative hydroxypyruvate isomerase. HYI gene orthologs have been reported in the rat, bovine, frog, zebrafish, chimpanzee and chicken species. Western Blot is the most common application for the HYI antibodies listed below. ELISA and Immunohistochemistry are also common applications.