Longitudinally oriented, cryosections of eyes from control (A, D), Dlg10 (B, E) and Dlg39 (C) P2 mice were stained with phalloidin to visualize filamentous actin. Shown are representative sections. A, D: In controls, actin is concentrated at the basal and apical surfaces of epithelial cells. At the apical ends of the fiber cells actin has a uniform pattern and is highly concentrated. B, E: In lenses from Dlg10 mice, actin accumulation in the epithelium appeared normal. However, in the fibers actin organization was disrupted where anterior sutures normally form (asterisk). C: In lenses from Dlg39 mice, actin accumulation was decreased in the apical ends of the fiber cells (box) and actin organization was nonuniform, especially where the suture forms. e=epithelium, f=fibers. Scale bars=50μm.