NH/NH allosterically activates SLC4A11 by causing an acidic shift in the intracellular pK that governs H(OH) conductance.

SLC4A11 is the most abundant membrane transport protein in corneal endothelial cells. Its functional presence is necessary to support the endothelial fluid pump that draws fluid from the corneal stroma, preventing corneal edema. Several molecular actions have been proposed for SLC4A11 including HO transport and cell adhesion.