Sodium/hydrogen exchanger 9 (SLC9A9)

May act in electroneutral exchange of protons for Na(+) across membranes. Involved from the effusion of Golgi luminal H(+) in exchange for cytosolic cations.

Involved in organelle ion homeostasis by contributing to the maintenance of the distinctive acidic pH values of the Golgi and post-Golgi compartments in the cell. .