Anti-OST4 antibodies are used in the immunodetection of the protein oligosaccharyltransferase complex subunit 4, non-catalytic. In humans, the canonical protein has a reported length of 37 amino acid residues and a mass of 4.2 kDa. Its subcellular localization is in the ER. A member of the OST4 protein family, OST4 is a known subunit of the oligosaccharyl transferase (OST) complex that catalyzes the initial transfer of a defined glycan (Glc(3)Man(9)GlcNAc(2) in eukaryotes) from the lipid carrier dolichol-pyrophosphate to an asparagine residue within an Asn-X-Ser/Thr consensus motif in nascent polypeptide chains, the first step in protein N-glycosylation. Synonyms for this target antigen include oligosaccharyltransferase 4 homolog, and dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 4. OST4 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 OST4 antibodies listed below. In addition, ELISA is also a common application.