Fig. 7. Bves antibody B846 blocks epithelial migration of the PEO. Control untreated PEOs show epithelial migration and mesenchyme formation from the explant (top left). Epithelial-mesenchymal transition is seen as the light fringe at the edge of the culture. Treatment with B846 blocks epithelial migration (top right). The number of mesenchymal cells that migrate out from the PEO was counted after DAPI staining (graph). Forty individual PEO samples were counted for control and treated groups.