. . . . . . . . . . . . . . . . . . "ptn_mouse"^^ . "Heparin-binding growth factor 8"^^ . "Heparin-binding brain mitogen"^^ . "Osteoblast-specific factor 1"^^ . "Heparin-binding growth-associated molecule"^^ . "Ptn"^^ . "Heparin-binding neutrophic factor"^^ . . . "Pleiotrophin"^^ .