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. Author manuscript; available in PMC: 2013 Jun 23.
Published in final edited form as: Genesis. 2011 Apr 1;49(4):222–230. doi: 10.1002/dvg.20716

Figure 2. Spatial morphogen and gene expression pathways.

Figure 2

Upper panel: Hox expression zones in early embryogenesis with migration paths for the CNC cells. Lower panel: morphogen synthesis occurring in primordial eye tissues, but the receptors and activated pathways reside in the surrounding POM. Large arrows reflect different potential streams of Shh and Ihh morphogenic gradients, one from the forebrain, and the other from the eye.