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Comparisons of Smo, Gli1 and Gli3 expression in lung sections. Smoothened (Smo, upper panel), Gli1 (middle panel) and Gli3 (bottom panel) showed a pattern of distribution similar to that seen with Shh and Ptch (compare to Fig. 7). No differences between wild-type (+/+) and knockout (-/-) embryos were evident. Original magnifications: 20X.
