Anti-OAT4 antibodies enable researchers to detect and measure the OAT4 antigen in biological samples. This target is a reported synonym of the SLC22A11 gene, which encodes solute carrier family 22 member 11. This protein is known to function in the transport of ions, among other biological roles. The human version of OAT4 has a canonical amino acid length of 550 residues and a protein mass of 60 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and notably expressed in the placenta, kidney, and epididymis. OAT4 is a member of the Organic cation transporter (TC 2.A.1.19) protein family.