Anti-placental growth factor antibodies are used in the immunodetection of the protein encoded by the PGF gene. In humans, the canonical protein has a reported length of 221 amino acid residues and a mass of 24.8 kDa. It is known to be a secreted protein. Alternative splicing is reported to yield 4 different isoforms for this protein. A member of the PDGF/VEGF growth factor protein family, it is known to be involved with cell differentiation and cell to cell signaling. Post-translational modifications have been described, including N-glycosylation. Other names for this target antigen include PGFL, PIGF, PLGF, PlGF-2, SHGC-10760, and D12S1900.