The function of Ensembl gene identifier ENSG00000050438 (SLC4A8, solute carrier family 4 member 8) is as follows. Mediates electroneutral sodium- and carbonate-dependent chloride-HCO3(-) exchange with a Na(+):HCO3(-) stoichiometry of 2:1 (PubMed:18577713). Plays a major role in pH regulation in neurons (By similarity). Mediates sodium reabsorption in the renal cortical collecting ducts (By similarity). {ECO:0000250|UniProtKB:Q8JZR6, ECO:0000269|PubMed:18577713}.