Anti-Apolipoprotein A-IV antibodies enable researchers to detect and measure the Apolipoprotein A-IV antigen in biological samples. This target is a reported synonym of the APOA4 gene, which encodes apolipoprotein A4. This protein is known to function in cholesterol metabolism and homeostasis, among other biological roles. The human version of Apolipoprotein A-IV has a canonical amino acid length of 396 residues and a protein mass of 45.4 kilodaltons. It is reported to be a secreted protein that is notably expressed in the small intestine, kidney, and duodenum. This target antigen may also be known as apolipoprotein A-IV. Some Apolipoprotein A-IV antibodies may have been used in research and have associated citations. ELISA, Western Blot, and Immunohistochemistry are common applications for these antibodies.