Anti-preptin antibodies enable researchers to detect and measure the preptin antigen in biological samples. This target is a reported synonym of the IGF2 gene, which encodes insulin like growth factor 2. This protein is known to function in organ morphogenesis and carbohydrate metabolism and homeostasis, among other biological roles. The human version of preptin has a canonical amino acid length of 180 residues and a protein mass of 20.1 kilodaltons, although 3 isoforms have been identified. It is reported to be a secreted protein that is notably expressed in the small intestine, placenta, and kidney. Other names for this target antigen include C11orf43, GRDF, and IGF-II. Some preptin antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.