Recombinant proteins for pleiotrophin are available from various sources. In humans, this protein has a Uniprot ID of P21246 and has an annotated function: 'Secreted growth factor that induces neurite outgrowth and which is mitogenic for fibroblasts, epithelial, and endothelial cells.' This protein is 168 amino acids in length and 19 kilodaltons in mass. It has been designated a subcellular localization as: secreted. This protein is encoded by the gene PTN. Other names also exist, such as: pleiotrophin, heparin affin regulatory protein, heparin-binding brain mitogen, heparin-binding growth factor 8, heparin-binding growth-associated molecule, heparin-binding neurite outgrowth promoting factor, heparin-binding neurite outgrowth-promoting factor 1, osteoblast-specific factor 1, pleiotrophin (heparin binding growth factor 8, neurite growth-promoting factor 1). This protein is conserved in other species, including: mouse, rat, zebrafish, chimpanzee, guinea pig.