Anti-Kv9.3 antibodies enable researchers to detect and measure the Kv9.3 antigen in biological samples. This target is a reported synonym of the KCNS3 gene, which encodes potassium voltage-gated channel modifier subfamily S member 3. This protein is known to function in potassium ion transport and the transport of ions, among other biological roles. The human version of Kv9.3 has a canonical amino acid length of 491 residues and a protein mass of 56 kilodaltons. It is reported to be localized in the cell membrane of cells and widely expressed in many tissue types. This target antigen may also be known as potassium voltage-gated channel subfamily S member 3.