Growth of BLIN-2 on fixed or lysed BM stromal cells. BM stromal cells were fixed in 1% paraformaldehyde or lysed in 1% Triton X-100 and then washed five times in medium before the addition of BLIN-2 cells. BLIN-2 growth was quantified on days 4 and 8. Each bar represents the mean ± SD of triplicate wells. This experiment is representative of four similar experiments.