Anti-synaptotagmin 9 antibodies are used for the immunodetection of the protein encoded by the SYT9 gene. In humans, the canonical protein has a reported length of 491 amino acid residues and a mass of 56.2 kDa. Its subcellular localization is in the cytoplasmic vesicles. A member of the Synaptotagmin protein family, it is suspected to be involved in Ca(2+)-dependent exocytosis of secretory vesicles through Ca(2+) and phospholipid binding to the C2 domain or may serve as Ca(2+) sensors in the process of vesicular trafficking and exocytosis. Other names for this target antigen include synaptotagmin IX and sytIX. Gene orthologs have been identified in the mouse, rat, bovine, frog, chimpanzee and chicken species. Some synaptotagmin 9 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, ELISA is also a common application.