Fig. 1.
Expression of hSDF-1β by tumor cells.
Levels of hSDF-1 secreted by PT67-SDF packaging cells, SDF-tumor cells, and control (mock) cells, as determined by hSDF-1 ELISA. Cell lines (106 cells/mL) were cultured for 24 hours and supernatants were collected, filtered (0.45-μm pore-size filter) and assayed for hSDF-1 levels.
