Anti-GALNT1 antibodies are used in the immunodetection of the protein polypeptide N-acetylgalactosaminyltransferase 1. In humans, the canonical protein has a reported length of 559 amino acid residues and a mass of 64.2 kDa. Its subcellular localization is in the Golgi and is secreted. Up to 2 different isoforms have been reported for this protein. It is widely expressed across many tissue types. A member of the Glycosyltransferase 2 protein family, GALNT1 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 GalNAc transferase 1, UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 1, UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase 1 (GalNAc-T1), and GALNAC-T1. Some GALNT1 antibodies may have been used in research and have associated citations. Immunofluorescence is a widely used application for these antibodies. Western Blot and Immunohistochemistry are also common applications.