Hematopoietic stem cell mobilizer binds to the CXCR4 chemokine receptor and inhibits the binding of its ligand, stromal cell-derived factor-1-alpha (SDF-1-alpha). This leads to mobilization of hematopoietic stem cells to the peripheral blood. The hematopoietic stem cells (CD34+ cells) are collected from the peripheral blood and used for autologous transplantation in patients with non-Hodgkin's lymphoma and multiple myeloma. Hematopoietic stem cells produce all types of blood cells so autologous transplantation restores normal production of the blood cells.