Anti-GALNT4 antibodies are used in the immunodetection of the protein polypeptide N-acetylgalactosaminyltransferase 4. In humans, the canonical protein has a reported length of 578 amino acid residues and a mass of 66.7 kDa. Its subcellular localization is in the Golgi. Up to 2 different isoforms have been reported for this protein. It is ubiquitously expressed across many tissue types. A member of the Glycosyltransferase 2 protein family, GALNT4 is known to catalyze the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor. Synonyms for this target antigen include GALNACT4, UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 4, UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase 4 (GalNAc-T4), and GALNAC-T4. GALNT4 gene orthologs have been reported in the bovine and chicken species. Some GALNT4 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.