Sodium/hydrogen exchanger 9B2 (Slc9b2)

Na(+)/H(+) antiporter which extrudes Na(+) or Li(+) in exchange for outside protons across the membrane (PubMed:18508966, PubMed:17988971). Contributes to the regulation of intracellular pH, sodium homeostasis, and cell volume.

Plays an important role for insulin secretion and clathrin-mediated endocytosis in beta-cells (PubMed:23720317). Involved in sperm motility and fertility (PubMed:27010853).