Please use this identifier to cite or link to this item: https://doi.org/10.1242/jeb.025239
Title: Increased gene expression of a facilitated diffusion urea transporter in the skin of the African lungfish (Protopterus annectens) during massively elevated post-terrestrialization urea excretion
Authors: Hung, C.Y.C.
Galvez, F.
Ip, Y.K. 
Wood, C.M.
Keywords: Ammonia
Facilitated diffusion urea transporter
Skin
Terrestrialization
Issue Date: 15-Apr-2009
Source: Hung, C.Y.C., Galvez, F., Ip, Y.K., Wood, C.M. (2009-04-15). Increased gene expression of a facilitated diffusion urea transporter in the skin of the African lungfish (Protopterus annectens) during massively elevated post-terrestrialization urea excretion. Journal of Experimental Biology 212 (8) : 1202-1211. ScholarBank@NUS Repository. https://doi.org/10.1242/jeb.025239
Abstract: The full-length cDNA sequence of a putative urea transporter (IfUl) of the facilitated diffusion UT-A type has been cloned from the African lungfish Protopterus annectens. The IFUTcDNA is 1990bp in length and its open reading frame encodes a 409 amino acid long protein, with a calculated molecular mass of 44,723 Da. The sequence is closest to those of amphibians (∼65% amino acid homology), followed by mammals and elasmobranchs (∼60%), and then teleosts (∼50%). IfUT was clearly expressed in gill, kidney, liver, skeletal muscle and skin. Upon re-immersion in water after 33days of air exposure ('terrestrialization'), lungfish exhibited a massive rise in urea-N excretion which peaked at 12-30h with rates of 2000-5000μmol-N kg-1 h -1 (versus normal aquatic rates of
Source Title: Journal of Experimental Biology
URI: http://scholarbank.nus.edu.sg/handle/10635/100910
ISSN: 00220949
DOI: 10.1242/jeb.025239
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