Anti-GPS antibodies enable researchers to detect and measure the GPS antigen in biological samples. This target is a reported synonym of the NBEAL2 gene, which encodes neurobeachin like 2. This protein is known to function in protein localization, among other biological roles. The human version of GPS has a canonical amino acid length of 2754 residues and a protein mass of 302.5 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the ER of cells and notably expressed in many tissues, such as the placenta and salivary gland. This target antigen may also be known as BDPLT4.