β-Catenin labeling showing breakdown of lens architecture in Epha2-knockout mouse lenses. Representative confocal microscopy images of sections of lenses of 18-week-old Epha2+/+ (A), Epha2+/− (B), and Epha2−/− (C) and 45-week-old Epha2+/+ (D) and Epha2+/− (E) mice on C57BL/6J background immunolabeled with mouse anti-β-catenin antibody (green) and DAPI (blue) to stain the nuclei are shown. Similar to N-cadherin labeling, β-catenin labeling delineated meridional rows of fiber cells in 18, A, and 45-week-old Epha2+/+, D, and 18-week-old Epha2+/−, B, lenses. In contrast, gross disorganization of fiber cells in 18-week-old Epha2−/−, C, and 45-week-old Epha2+/−, E, lenses was observed. Sections probed with mouse IgG (negative control) revealed little or no non-specific labeling (F). Scale-bars 20 µm.