Anti-PAPPA1 antibodies enable researchers to detect and measure the PAPPA1 antigen in biological samples. This target is a reported synonym of the PAPPA gene, which encodes pappalysin 1. This protein is known to function in receptor-mediated signaling pathways and proteolysis, among other biological roles. The human version of PAPPA1 has a canonical amino acid length of 1627 residues and a protein mass of 181 kilodaltons. It is reported to be a secreted protein that is notably expressed in the placenta. Other names for this target antigen include ASBABP2, DIPLA1, and IGFBP-4ase. ELISA and Immunofluorescence are common applications for PAPPA1 antibodies.