Table 6. Proposed hierarchy for Slc4 family members within a given functional group.
| Functional group | Primary | Secondary |
|---|---|---|
| Na bicarbonate cotransporters (NBCs) |
NBCe1 (Slc4a4) |
NBCn1 (Slc4a7) |
| Anion exchangers (AEs) |
AE2 (Slc4a2) |
AE3 (Slc4a3) |
| Na-driven Cl-/HCO3- exchangers (NDCBEs) | AE1 (Slc4a1) | NDCBE (Slc4a8) |
The genes were categorized according to their relative levels of expression in mouse corneal endothelium.