Figure 1. Expression levels of selected ion transporters in normal human corneal endothelium. Figure shows average normalized Ct value (Δ Ct value) for each ion-transporter. Gene with lowest ∆Ct has highest expression. solute carrier family 4 member 11 (SLC4A11), Na⁺/K⁺ ATPase (sodium potassium ATPase), sodium bicarbonate cotransporter-1 (pNBCe1), sodium proton exchanger-1 (NHE1), mono carboxylate transporters (MCTs).