Fig. 3. Expression of regulatory genes expressed in the MFP of wild-type embryos is
not maintained in mol-/- mutants. Dorsal (A-E,J,K) and
lateral (F-I) views of wild-type (D,F,H,J) and mol-/-
embryos (E,G,I,K), at ages shown in the bottom left-hand corner, analysed for
expression of various genes (indicated in the bottom right-hand corner). (A-C)
Clutches of embryos from parents heterozygous for the
moltv53a mutation. No obvious differences in twhh,
her9 or ntn1 expression in prospective floorplate between
wild-type and mol-/- mutants is evident at these early
stages. The arrowheads in D,E show gaps in floorplate shh expression
in the mol-/- embryo compared with wild type.