Fig. 1
Alk8 Is Specifically Required for Myelopoiesis in the Anterior Lateral Plate Mesoderm (A–D) Gene expression marking cells of the anterior myeloid precursor pool was vastly reduced in lost-a-fin/alk8 (laf) mutant embryos. Expression of pu.1 (A) (n = 16), runx1 (B) (n = 13), c-myb (C) (n = 9), and ikaros (D) (n = 11) is shown. (E–I) scl expression, endothelial precursor, and myocardial precursor cell types derived from the ALPM develop normally in laf mutant embryos. Expression of scl (E, F) (n = 40 at 10 s and n = 46 at 14 s), gata1 (G) (n = 41), fli1 (H) (n = 9), and nkx2.5 (I) (n = 15) is shown. All images are dorsal views of the anterior of flat-mounted embryos, with the somitic age shown in the bottom right corner of each panel. The genotype was determined by examining the patterning phenotype of the embryos. |
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Stage Range: | 10-13 somites to 14-19 somites |