Fig. 1.
Flow cytometric analysis of the expanded peripheral blood B-cell population.
Patient PBMCs were stained for CD19 and CD27 and gated according to light-scatter properties. Propidium iodide and CD19 expression were used to identify viable CD19+ cells. Cells were counterstained for CD20, CD5, CD10, sIgM, sIgκ light chain, and sIgλ light chain, respectively, and were plotted against CD27.