Anti-PSG3 antibodies are used in the immunodetection of the protein pregnancy specific beta-1-glycoprotein 3. In humans, the canonical protein has a reported length of 428 amino acid residues and a mass of 47.9 kDa. It has been described to be a secreted protein. It is notably expressed in the placenta and testis. A member of the CEA protein family, PSG3 is known to be involved with signal transduction pathways. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include PSBG-3, carcinoembryonic antigen SG5, pregnancy-specific glycoprotein 3, and PS-beta-G-3. Western Blot is the most common application for the PSG3 antibodies listed below. ELISA and Immunohistochemistry are also common applications.