Anti-MGAT4B antibodies are used in the immunodetection of the protein alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase B. In humans, the canonical protein has a reported length of 548 amino acid residues and a mass of 63.2 kDa. Its subcellular localization is in the Golgi. Up to 3 different isoforms have been reported for this protein. It is widely expressed across many tissue types. A member of the Glycosyltransferase 54 protein family, MGAT4B is a reported glycosyltransferase that catalyzes the transfer of GlcNAc from UDP-GlcNAc to the GlcNAcbeta1-2Manalpha1-3 arm of the core structure of N-linked glycans through a beta1-4 linkage and participates in the production of tri- and tetra-antennary N-linked sugar chains. Synonyms for this target antigen include GNT-IVB, N-acetylglucosaminyltransferase IVb, N-glycosyl-oligosaccharide-glycoprotein N-acetylglucosaminyltransferase IVb, and GNT-IV. MGAT4B gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Western Blot is a widely used application for the MGAT4B antibodies listed below. In addition, ELISA is also a common application.