Fig. 7. Localization of Na+/K+-ATPase immunoreactive (IR)
cells on the afferent edge of the gill filament of a freshwater transformer.
Image capture conditions were optimized for (A) the cluster of strongly IR
chloride cells (CCs) and (B) weakly IR cells indicated by arrowheads and
arrows, respectively. (C) The corresponding merged image overlaid with DAPI
nuclear staining (blue) and differential interference contrast (DIC) is given
for orientation. Scale bar, 25 µm.