Pleiotrophin is a human gene encoded by the symbol, PTN. It may also be known as: Heparin-binding brain mitogen; HBBM; Heparin-binding growth-associated molecule; HB-GAM; Heparin-binding neurite outgrowth-promoting factor 1; HBNF-1; Osteoblast-specific factor 1; OSF-1; heparin binding growth factor 8; HBGF8; HBNF; NEGF1. The encoded protein has an amino acid length of 168 and a mass of 18.9 kDa. Pleiotrophin is a member of the Pleiotrophin family. Homologs of this gene exist in other organisms, including: Frog.