The present invention provides methods of using Bv8 and EG-VEGF
polypeptides and nucleic acids to promote hemtopoiesis. Also provided
herein are methods of screening for modulators of Bv8 and EG-VEGF
activity. Furthermore, methods of treatment using Bv8 and EG-VEGF
polypeptides or Bv8 and EG-VEGF antagonists are provided.