Figure 3

Vibratome sections of whole-mount in situ hybridization embryos. Sectioning of stage HH23 whole mount in situ hybridization embryos indicates that both LHX7 (left column) and LHX6 (right column) show expression in the neural crest-derived mesenchyme of the first branchial arch (maxillary primordia shown) (c, d) and the lateral globular masses at the edges of the medial nasal process (e, f) restricted to the region directly subjacent to the ectoderm. Abbreviations: max mes: maxillary primordia mesenchyme; ep: epithelium; mnp: medial nasal process