Anti-VPS33B antibodies are used in the immunodetection of the protein VPS33B late endosome and lysosome associated. In humans, the canonical protein has a reported length of 617 amino acid residues and a mass of 70.6 kDa. Its subcellular localization is in the cytoplasmic vesicles, lysosomes, and membrane. Up to 2 different isoforms have been reported for this protein. It is widely expressed across many tissue types. A member of the STXBP/unc-18/SEC1 protein family, VPS33B is believed to play a role in vesicle-mediated protein trafficking to lysosomal compartments and in membrane docking/fusion reactions of late endosomes/lysosomes. Synonyms for this target antigen include PFIC12, vacuolar protein sorting-associated protein 33B, vacuolar protein sorting 33 homolog B, vacuolar protein sorting 33-like protein B, and KDIDAR. VPS33B gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of VPS33B antibodies have been mentioned in research publications and have associated citations. Immunohistochemistry is a widely used application for these antibodies. ELISA, Western Blot, and Immunofluorescence are also common applications.