Anti-SUSD3 antibodies are used in the immunodetection of the protein sushi domain containing 3. In humans, the canonical protein has a reported length of 255 amino acid residues and a mass of 27.1 kDa. Its subcellular localization is in the cell membrane. Up to 3 different isoforms have been reported for this protein. It is reported to be highly expressed in estrogen receptor-positive breast tumors. SUSD3 is believed to play a role in breast tumorigenesis by promoting estrogen-dependent cell proliferation, cell-cell interactions and migration. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include sushi domain-containing protein 3. SUSD3 gene orthologs have been reported in the mouse, rat, bovine, chimpanzee and chicken species. ELISA, Western Blot, Immunocytochemistry, Immunofluorescence, and Immunohistochemistry are common applications for SUSD3 antibodies.