Localization of NDCBE to the hippocampus of the human brain (adapted, with permission, from 81). (B) Effects of knockout of NDCBE (Slc4a8) on Na+-dependent pHi changes in intercalated cells in mice cortical collecting ducts (adapted, with permission, from 187). Traces are the average of pHi changes recorded when luminal Na+ was removed and readded, in the presence of extracellular HCO3−. The data provides functional evidence for the presence of NDCBE in the apical membrane, which is important for reabsorption of Na+ by these cells.