Expression of ▵LNGFR in erythoid cells (TER119⁺) at different stages of differentiation, obtained from the BM of a mouse 2 months after transplantation of GATA-SFCM–transduced BM cells. Cells were stained with FITC-conjugated anti-▵LNGFR (X axis on the right panels) and PE-conjugated anti-TER 119 (Y axis on the right panels) antibodies. Positivity to both markers was analyzed in three separate BM fractions, gated according to their forward scatter (SSC, Y axis in the left panels) profile and containing, respectively, large erythroblasts (A), mature erythroblasts (B), and erythrocytes (C).