Anti-Calcium-dependent secretion activator antibodies are used for the immunodetection of the protein encoded by the CADPS gene. In humans, the canonical protein has a reported length of 1353 amino acid residues and a mass of 152.8 kDa. Its subcellular localization is in the cytoplasmic vesicles and membrane. Alternative splicing is reported to yield 5 different isoforms for this protein. It is notably expressed in neural and endocrine secretory tissues. It is known to be a calcium-binding protein involved in exocytosis of vesicles filled with neurotransmitters and neuropeptides. Other names for this target antigen include CAPS, CAPS1, UNC-31, calcium-dependent secretion activator 1, CAPS-1, and CADPS1. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.