Fig. 3.
The effect of 2.4G2 on differentiation of B-lineage precursor cells (B220+, IgM−, HSAhi). Fresh FACS-sorted B220+, IgM− bone marrow cells (left panel) were cocultured with bone marrow stromal cell line BMS2. IgM and HSA expression on B220+ cells after 72 hours of culture without (middle panel) or with 2.4G2 (25 μg/mL; right panel). Cultures with 2.4G2 showed an enhanced percentage of cells with IgM expression and increased amounts of IgM per cell.