Fig. 6: Schematic overview of the NBCn1 OF ↔ IF elevator-type transport cycle.
From: CryoEM and computational modeling structural insights into the pH regulator NBCn1

Gate domain (purple oval), core domain (pink, cyan, and yellow oval in the OF, Int, and IF states, respectively), gate and core domain hydrophobic residues from the contact interface (red squares), ion binding sites (white ovals), CO32− ions (green triangles), Na+ ions (purple spheres), water molecules (small dark blue spheres).