Figure 3.

Hematopoietic precursor activity resides in distinct Eng⁺ sub-populations at different stages of development. Frequency of hematopoietic progenitors in E⁻F⁻, E⁻F⁺, E⁺F⁺, and E⁺F⁻ cells sorted from E8.5 and 9.5 yolk sacs (representative gates are shown in Figure 2A). Error bars indicate SEM from at least 4 independent experiments. *p<0.05 and **p<0.001 for comparisons between E⁺F⁺ and E⁺F⁻ cells