CLL-like MBL may show a normal κ/λ ratio. Flow cytometric analyses from a representative sample from 6 individuals carrying a CLL-like MBL phenotype with a normal (< 3:1 or > 1:3) κ/λ ratio. (A) Dot plot was obtained by gating on CD19⁺ lymphocytes (identified on forward-scatter vs CD19 profiles, not shown). The intensity of CD20 and CD5 is shown on the x-axis and y-axis, respectively. R1 gate indicates the CLL-like MBL cells. (B) Dot plot shows κ and λ light chain expression of the B-cell clone as identified on panel A. All other B-cell populations present in the dot plot (A) are polyclonal (data not shown).