Fig. 8. Decreased cell proliferation in the coronal suture of Fgfr2IIIc/ fetuses during skull vault growth. (A,B) Levels of BrdU incorporation are normal at E14.5. (C,D) Numbers of BrdU-labelled cells are reduced at E16.5. (E,F) At P1, only a few BrdU-positive cells are observed in the mutant. (G,H) Parallel Mallory-stained P1 sections showing the ossification fronts. al, alisphenoid cartilage; f, frontal bone; p, parietal bone. Scale bar: 100 µm.