- Carbonic anhydrase XIV is enriched in specific membrane domains of retinal pigment epithelium, Muller cells, and astrocytes. Nagelhus, E.A., Mathiisen, T.M., Bateman, A.C., Haug, F.M., Ottersen, O.P., Grubb, J.H., Waheed, A., Sly, W.S. Proc. Natl. Acad. Sci. U.S.A. (2005)