Anti-GnTIVb antibodies are used in antigen-specific immunodetection in biological samples. The target GnTIVb is a known alias name of the protein alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase B, encoded by the MGAT4B gene in humans. This 548-amino acid residue protein 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. It is localized to the Golgi of the cell and features N-glycosylated post-translational modifications. In terms of tissue expression, it is widely expressed across many tissue types.