Anti-OS9 antibodies are used in the immunodetection of the protein OS9 endoplasmic reticulum lectin. In humans, the canonical protein has a reported length of 667 amino acid residues and a mass of 75.6 kDa. Its subcellular localization is in the ER. Up to 8 different isoforms have been reported for this protein. It is ubiquitously expressed across many tissue types. A member of the OS-9 protein family, OS9 is known to be involved with protein ubiquitination. Post-translational modifications have been described, including N-glycosylation. Synonyms for this target antigen include protein OS-9, amplified in osteosarcoma 9, endoplasmic reticulum lectin 2, erlectin 2, and ERLEC2. OS9 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish and chimpanzee species. A number of OS9 antibodies have been mentioned in research publications and have associated citations. Immunohistochemistry is a widely used application for these antibodies. Western Blot, Immunocytochemistry, and Immunofluorescence are also common applications.