Soluble fibronectin does not provide any benefit to Bcr-Abl⁺ cells.

Bcr-Abl⁺ BaF3 cells were cultured either in suspension on polyHEMA-coated dishes in the presence (░) or absence (■) of soluble fibronectin or on immobilized fibronectin (▪). Selectively adherent cells (on immobilized fibronectin) or all cells (in suspension with soluble fibronectin) were irradiated with 0, 8, or 50 Gy. After a growing period of 17 hours, the percentage of apoptotic cells was determined by using Annexin V-FITC assay. Values reflect the mean ± SEM of 3 independent examinations.