Distribution and expression patterns of nectins in the mouse OE. (A) Immunostainings for ZO-1, nectin-1, -2, and -3 in the OE on P28. (B) Immunostainings for nectins in sections of the mouse OE on P28. Arrowhead indicates Bowman’s gland. The reason why the reactivity of the anti-nectin-1 antibody tends to increase in the OE sections is unknown. (C) In situ hybridizations in sections of the OE on P28. Each panel shows staining for DAPI (blue), OMP (green), and mRNA for each nectin (red). Dotted lines show the basal lamina. The two-way arrows indicate SC or OC layers.