Chemotaxis of CD34⁺BM MNCs and normal human hematopoietic cells.

Data are presented as a migration index. The data are representative of 3 experiments yielding similar results. (A) Chemotaxis of freshly isolated CD34⁺ BM MNCs: day-6 BFU-E–derived; day-6 CFU-GM–derived; day-6 CFU-Meg–derived cells to media conditioned by CD34⁺ cells (CD34⁺ sup) or to control media (C). (B) Chemotaxis of normal human hematopoietic cells (CD34⁺ cells and BFU-E–, CFU-GM–, and CFU-Meg–derived cells) to media conditioned by cells from BM stroma or to a control medium.