... levels and urea excretion rates increase markedly, and mRNA expression for the branchial urea transporter mtUT is elevated. Plasma cortisol increases and branchial mRNAs for Rhbg , Rhcg2 and Na + ,K + -ATPase are all upregulated. Enzymatic activity of the latter is activated preferentially by NH 4...

...), which transports water but not glycerol (urea transport was not studied) ( Kikawada et al., 2008 ), and AgAQP1 from Anopheles gambiae (XP_319585.4) and EsAQP1 from Eurosta solidaginis (FJ489680), which transport water ( Liu et al., 2011 ; Philip et al., 2011 ). Fully conserved amino acids...

... the ammonoteles, Rh (Rhesus) proteins are beginning to emerge as vital ammonia conduits. Many fishes are also known to be capable of substantial synthesis and excretion of urea as a nitrogenous waste. In such species, members of the UT family of urea transporters have been identified as important players in urea...

...Patrick J. Walsh; Chris M. Wood; Steve F. Perry; Serge Thomas ABSTRACT Although urea transport is receiving increased attention in mammalian systems, very little is known about urea transport in fish tissues. This study examined mechanisms of urea transport in red blood cells and hepatocytes from...