Do zebrafish Rh proteins act as dual ammonia–CO₂ channels?

Abstract excerpt

Transfer of the small gaseous molecules CO2 and NH3 across biological membranes, long thought to occur solely by simple diffusion, is now known to be facilitated by members of two multigene families: aquaporins (AQP) and rhesus (Rh) proteins. Although it is accepted that AQP1 and Rh proteins are involved in CO2 and NH3 transfer, respectively, the idea that a single channel can exhibit selectivity for both gases...

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