Anti-NAPI-1 antibodies enable researchers to detect and measure the NAPI-1 antigen in biological samples. This target is a reported synonym of the SLC17A1 gene, which encodes solute carrier family 17 member 1. This protein is known to function in the transport of ions, among other biological roles. The human version of NAPI-1 has a canonical amino acid length of 467 residues and a protein mass of 51.1 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells. NAPI-1 is a member of the Sodium/anion cotransporter protein family.