Anti-Fucosyltransferase 2 antibodies are used in the immunodetection of the protein encoded by the FUT2 gene. In humans, the canonical protein has a reported length of 343 amino acid residues and a mass of 39 kDa. Its subcellular localization is in the golgi. A member of the Glycosyltransferase 11 protein family, it is known to catalyze the transfer of L-fucose, from a guanosine diphosphate-beta-L-fucose, to the terminal galactose on both O- and N-linked glycans chains of cell surface glycoproteins and glycolipids and the resulting epitope regulates several processes such as cell-cell interaction including host-microbe interaction, cell surface expression and cell proliferation. Post-translational modifications have been described, including glycosylation. Other names for this target antigen include SE, SEC2, Se2, sej, galactoside alpha-(1,2)-fucosyltransferase 2, and B12QTL1.