Anti-APOBR antibodies are used in the immunodetection of the protein apolipoprotein B receptor. In humans, the canonical protein has a reported length of 1097 amino acid residues and a mass of 115.6 kDa. Its subcellular localization is in the cell membrane. Up to 3 different isoforms have been reported for this protein. It is reported to be expressed in peripheral blood leukocytes > bone marrow = spleen > lymph node, and only faintly visible in appendix and thymus. APOBR is reported to be a macrophage receptor that binds to the apolipoprotein B48 (APOB) of dietary triglyceride (TG)-rich lipoproteins (TRL) or to a like domain of APOB in hypertriglyceridemic very low density lipoprotein (HTG-VLDL). Synonyms for this target antigen include apolipoprotein B-100 receptor, apolipoprotein B-48 receptor, apolipoprotein B100 receptor, apolipoprotein B48 receptor, and apoB-48R. APOBR gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. Some APOBR antibodies may have been used in research and have associated citations. Western Blot is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.