Percentage of cdx4^−/− embryos rescued after treatment with DEAB at different stages of development. Embryos from incrosses of cdx4^+/− heterozygotes were treated with DMSO or DEAB (2 × 10⁻⁵M) at various stages of development. The height of each bar indicates the percentage of total cdx4^−/− embryos with increased gata1 expression after DEAB treatment compared with untreated embryos. The total number of mutant embryos for each incubation period was compiled from 2 to 3 separate experiments. The raw data are presented in Table 1.