Growth of BLIN-2 on BM stromal cells. BLIN-2 cells (2.5 × 10⁴/well) were cultured on various concentrations of BM stromal cells, and the number of BLIN-2 cells was quantified on days 7, 10, and 14. Each symbol represents the mean ± SD of triplicate wells. One hundred percent confluency corresponds to approximately 6 × 10³ BM stromal cells per 200-μL flat-bottom microtiter well. This experiment is representative of five similar experiments.