Fig. 3
Expression of gdf5/6/7 homologs in larval lamprey. All scale bars are approximately 250μm. (A) gdf5/6/7a is identified as a single streak along the dorsal-most part of the body. (B,C) gdf5/6/7a is ubiquitous throughout the developing head at stages T27 and T28, with no association with any particular tissue. (D) gdf5/6/7c is ubiquitous at all stages of interest. (E) gdf5/6/7b is observed in the ventral pharynx and in the mesenchyme of the upper lip. (F) gdf5/6/7b can be found in the oral hood, medial flap, otic capsule, the dorsal and ventral edges of the branchial arches, and the hyoid. (G) gdf5/6/7b is identified in the oral hood, oral ectoderm, ventral pharynx, pharyngeal endoderm, endostilic epithelium, and the ventromedial longitudinal bar. Keywords: ba: branchial arches; ee: endostilic epithelium; hy: hyoid; oe: oral ectoderm; oc: otic capsule; oh: oral hood; mf: medial flap; pe: pharyngeal endoderm; vmlb: ventromedial longitudinal bar; vp: ventral pharynx