... Group,2Anatomy and 3Cell Biology, Faculty of Medicine and Dentistry,University of Alberta, Edmonton, Alberta, CanadaThe Na+/H+exchanger is a ubiquitous membrane protein of bacteria, plants and ... microdomains.Treatment of cells with methyl b-cyclodextrin had a smallstimulatory effect on Na+/H+exchanger activity and reduced the amount of Na+/H+exchanger in low densitymembrane fractions. Our study ... theNa+/H+exchanger and of caveolin, a marker of lipid rafts.To avoid possible detergent-induced artifacts that couldeither alter the distribution of the Na+/H+exchanger or theconstituency of the lipid rafts,...