The function of Ensembl gene identifier ENSG00000132677 (RHBG, Rh family B glycoprotein) is as follows. Ammonium transporter involved in the maintenance of acid-base homeostasis. Transports ammonium and its related derivative methylammonium across the basolateral plasma membrane of epithelial cells likely contributing to renal transepithelial ammonia transport and ammonia metabolism. May transport either NH4(+) or NH3 ammonia species predominantly mediating an electrogenic NH4(+) transport (PubMed:15284342, PubMed:15929723, PubMed:24077989). May act as a CO2 channel providing for renal acid secretion (PubMed:24077989). {ECO:0000269|PubMed:15284342, ECO:0000269|PubMed:15929723, ECO:0000269|PubMed:24077989}.