Assessment of protein expression of lymphoid and myeloid surface markers in normal and early MDSCD34⁺ cells. Mononuclear cells were stained for CD34 and a number of lymphoid or myeloid antigens. Representative plots are shown. The boxes indicate mean values ± standard deviation for 6 control samples and 7 early MDS samples used in the analysis. CD34/19 (A), CD34/24 (B), CD34/10 (C), CD34/IL-7R (D), CD34/33 (E).