FACS histograms of TER119(−) cells from 3 (day 14) fetal livers stained for FDG.

The 3 fetal livers are A, B, and C. Negative controls are indicated by shaded histograms. Solid, bold lines represent FDG positivity in fetal liver TER119(−) cells, and dashed lines show FDG positivity in Rosa-β-geo cells used as positive controls. Negative controls are non-FDG-stained cells (shaded peak) or FDG-stained nontransgenic fetal liver cells (dashed line in Figure 3C; both peaks are virtually superimposable). Populations sorted for culture are indicated (M1 = FDG high; M2 = FDG med; M3 = FDG neg).