Rendered confocal z-stack ( d ) and basal plane optical section with orthogonal views ( e ) of a typical human esophageal epithelioid stained for KRT4 (red), ITGA6 (gray), KI67 (green) and DAPI (blue). Scale bar, 38 m (top down view, x – y ) and 15 m (inset, side view, z ).
