Listed are ELISA Kits for the detection of Osteoblast Specific Factor 2, an alias name of Periostin. The human protein, encoded by the gene POSTN, is 836 amino acid residues long and has a mass of 93314 daltons. However, there are up to 7 reported isoforms. Homologs have been identified in the following species: Mouse, Rat, Zebrafish, Frog, Chicken. Osteoblast Specific Factor 2 may also be known by other names: OSF-2; PN; periostin; osteoblast specific factor 2.