<i>hoxd4a</i> is required for hemangioblast formation.

<p>(A,B) Normal expression at 13 hpf of posterior hemangioblast markers <i>scl1</i> (A) and <i>lmo2</i> (B) in the PLM. (C,D) Expression of these markers is greatly reduced in <i>hoxd4a</i> morphants, but is rescued by co-injection of capped mRNA for <i>hoxd4a</i> (E,F). Ratios indicate the fraction of embryos showing the presented phenotype. Anterior is to the left. A, C and E are dorsal views of flat-mounted specimens while B, D and F are lateral views. Scale bars equal 100 µm. A is at a lower magnification than C and E.</p>