Anti-MDR2/3 antibodies enable researchers to detect and measure the MDR2/3 antigen in biological samples. This target is a reported synonym of the ABCB4 gene, which encodes ATP binding cassette subfamily B member 4. This protein is known to function in the metabolism of lipids, among other biological roles. The human version of MDR2/3 has a canonical amino acid length of 1286 residues and a protein mass of 141.5 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cell membrane, cytoplasmic vesicles, and cytoplasm of cells and notably expressed in the liver. Other names for this target antigen include ABC21, GBD1, and ICP3. Western Blot is the most common application for the MDR2/3 antibodies listed below. ELISA, Immunocytochemistry, and Immunohistochemistry are also common applications.