Anti-ST8 alpha-N-acetylneuraminate alpha-2,8-sialyltransferase 5 antibodies enable researchers to detect and measure the ST8 alpha-N-acetylneuraminate alpha-2,8-sialyltransferase 5 antigen in biological samples. This target is a reported synonym of the ST8SIA5 gene, which encodes ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 5. This protein is known to function in carbohydrate metabolism and homeostasis and protein glycosylation, among other biological roles. The human version of ST8 alpha-N-acetylneuraminate alpha-2,8-sialyltransferase 5 has a canonical amino acid length of 376 residues and a protein mass of 43.9 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the Golgi of cells and notably expressed in the testis, hippocampus, cerebral cortex, cerebellum, and caudate. ST8 alpha-N-acetylneuraminate alpha-2,8-sialyltransferase 5 is a member of the Glycosyltransferase 29 protein family.