Fig. 5.

Immunoreactivity for selected signaling molecules in the epithelial cultures. A, N-cadherin immunoreactivity was present at cell–cell junctions. B, β-Catenin immunoreactivity was observed at the cell–cell junction and in cell nuclei. Some cells also contained diffuse cytoplasmic β-catenin immunoreactivity. C, FAK immunoreactivity was observed at points of contact between cells and the fibronectin substrate. Scale bar, 10 μm.