Anti-IGSF9 antibodies are used in the immunodetection of the protein immunoglobulin superfamily member 9. In humans, the canonical protein has a reported length of 1179 amino acid residues and a mass of 126.6 kDa. Its subcellular localization is in the cell membrane. Up to 2 different isoforms have been reported for this protein. A member of the Turtle protein family, IGSF9 is reported to function in dendrite outgrowth and synapse maturation. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include immunoglobulin superfamily member 9A, turtle homolog A, and protein turtle homolog A. IGSF9 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Some IGSF9 antibodies may have been used in research and have associated citations. These antibodies are most commonly used in Flow Cytometry experiments, among other applications.