Taurine transport by the flounder (Pseudopleuronectes americanus) intestine

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Abstract
Taurine transport by the flounder gut was characterized in isolated strips of intestine mounted between Ringer's solutions. Taurine was transported into the cell, against its concentration gradient, by a sodiumdependent system present in both the mucosal and serosal membranes. This system appears to be specific for β-amino acids and is regulated by cyclic nucleotides (cGMP and cAMP). Kinetic analyses indicated that under physiological conditions the magnitudes of the bidirectional taurine uptake rates would favor net absorption of taurine from lumen to blood.