rther investigation in D. pagei gills.
One of the two membrane fractions of different density exhibiting
V-ATPase activity, revealed by sucrose gradient analysis, most likely
derives from the apical membranes of the thin epithelial ionocytes in
the asymmetric posterior gills of D. pagei. Such a V-ATPase may drive
chloride transport across the fine in/evaginations of these membranes.