Stage-specific requirement for GATA2 during DC differentiation. (A) Percentages of DCs generated in each culture were determined using flow cytometry. To compare different experiments, data were normalized to the cell numbers of Gata2^f/f cultures in the absence of tamoxifen (B). Data are expressed as means ± SDs (n = 3). *P < .05, **P < .01. NS, not significant.