Anti-MSRB1 antibodies are used in the immunodetection of the protein methionine sulfoxide reductase B1. In humans, the canonical protein has a reported length of 116 amino acid residues and a mass of 12.8 kDa. Its subcellular localization is in the nucleus and cytoplasm. It is notably expressed in many tissues, such as the bone marrow and duodenum. A member of the MsrB Met sulfoxide reductase protein family, MSRB1 is reported to be a methionine-sulfoxide reductase that specifically reduces methionine (R)-sulfoxide back to methionine. Post-translational modifications have been described, including ubiquitination. Synonyms for this target antigen include SELENOR, SELENOX, SELR, SELX, SEPX1, SepR, methionine-R-sulfoxide reductase B1, and HSPC270. MSRB1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. Some MSRB1 antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. ELISA, Immunofluorescence, and Immunohistochemistry are also common applications.