Anti-REG1B antibodies are used in the immunodetection of the protein regenerating family member 1 beta. In humans, the canonical protein has a reported length of 166 amino acid residues and a mass of 18.7 kDa. It has been described to be a secreted protein. It is notably expressed in the small intestine, pancreas, and duodenum. REG1B is suspected to act as an inhibitor of spontaneous calcium carbonate precipitation. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include REGH, REGI-BETA, REGL, lithostathine-1-beta, PSP-2, REG-1-beta, pancreatic stone protein 2, and PSPS2. REG1B gene orthologs have been reported in the mouse, rat and chimpanzee species. Some REG1B antibodies may have been used in research and have associated citations. ELISA is a widely used application for these antibodies. Western Blot and Immunohistochemistry are also common applications.