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. Author manuscript; available in PMC: 2010 Apr 8.
Published in final edited form as: Dev Biol. 2009 Jan 20;328(1):13–23. doi: 10.1016/j.ydbio.2008.12.041

Fig. 4. Spectrum of BA1 fusion inTwsg1−/− embryos at E9.5.

Fig. 4

(A,A') Wild type embryo in frontal and lateral views. (B,B'-D,D') Three classes of Twsg1 mutants. Class A - normal appearance of the BA1; Class B - partial midline fusion of BA1 with some preservation of the forebrain; Class C - severe midline fusion with ventral displacement of BA1 and severe reduction of anterior head structures. (E) Micro-dissected wild type BA1 at E10.5. (F) Mutant BA1 class C with severe midline fusion of the mandibular components and only partial separation of the maxillary components at E10.5. Dashed lines outline the mandibular prominences of BA1; mx, maxillary component of BA1; md, mandibular component of BA1. Scale bar: 200 μm.