Fig. 8. Ptch1 expression in wild type and Sufu-/-
mutants. Whole-mount in situ hybridization using a Ptch1
digoxigenin-labeled riboprobe on wild-type (A) and Sufu-/-
(B) embryos at 9.5 dpc. The Sufu-/- embryo exhibited an
expansion of the expression domain and gross overexpression of
Ptch1.