Fig. 3

Male reproductive tract. Apical attenuation of the a4 subunit (a) and apical attenuation accompanied by intracellular staining for the B1 subunit (b) in cells of the ampullary gland. Immunostaining in the epididymis of p14 (c, d, g, h) and p21 animals (e, f, i, j) showed the a4 subunit was apically expressed in +/+ animals (c, e) and absent in −/− animals (g, i). However the B1 subunit’s apical location is similar in both +/+ (d, f) and −/− animals (h, J) at both ages. Scale bars: 20 μm