Anti-Nav 1.5 antibodies enable researchers to detect and measure the Nav 1.5 antigen in biological samples. This target is a reported synonym of the SCN5A gene, which encodes sodium voltage-gated channel alpha subunit 5. This protein is known to function in brain development, among other biological roles. The human version of Nav 1.5 has a canonical amino acid length of 2016 residues and a protein mass of 226.9 kilodaltons, although 6 isoforms have been identified. It is reported to be localized in the cell membrane and cytoplasm of cells. Other names for this target antigen include CDCD2, CDCD2, and CMD1E.