Anti-CD109 antibodies are used in the immunodetection of the protein CD109 molecule. In humans, the canonical protein has a reported length of 1445 amino acid residues and a mass of 161.7 kDa. Its subcellular localization is in the cell membrane. Up to 4 different isoforms have been reported for this protein. It is reported to be widely expressed with high level in uterus, aorta, heart, lung, trachea, placenta and in fetal heart, kidney, liver, spleen and lung. A member of the Protease inhibitor I39 (alpha-2-macroglobulin) protein family, CD109 is known to be involved with hair follicle development. Synonyms for this target antigen include 150 kDa TGF-beta-1-binding protein, C3 and PZP-like alpha-2-macroglobulin domain-containing protein 7, Gov platelet alloantigens, activated T-cell marker CD109, and CD109 antigen. CD109 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of CD109 antibodies have been mentioned in research publications and have associated citations. Flow Cytometry is a widely used application for these antibodies. In addition, Immunohistochemistry is also a common application.