Fig. 3. Representative images of Na+/K+-ATPase immunostaining
in gills from sham-operated (A), acid-infused (B), base-infused (C) and
NaCl-infused (D) fish. The sections were from equivalent regions in the gill
filament, near the trailing edge. Note the greater number of labeled cells in
the lamellae in B and C. Scale bar, 10 µm.