Anti-ALP1 antibodies enable researchers to detect and measure the ALP1 antigen in biological samples. This target is a reported synonym of the ALPG gene, which encodes alkaline phosphatase, germ cell. This protein is reported to be an alkaline phosphatase that can hydrolyze various phosphate compounds. The human version of ALP1 has a canonical amino acid length of 532 residues and a protein mass of 57.4 kilodaltons. It is reported to be localized in the cell membrane of cells and notably expressed in the small intestine, rectum, placenta, duodenum, and colon. ALP1 is a member of the Alkaline phosphatase protein family.