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The taurine transport of flounder erythrocytes is associated with a cell volume regulation in anisosmotic media. An osmolality reduction leads to a cell volume increase, which is followed by a volume readajustment towards the original level. A 75 mosM reduction is accompanied by a 33 mumol g dry wt.-1 reduction in the cellular taurine content. The reduction(More)
95% of the Na(+)-independent influx of taurine in flounder erythrocytes at normal osmolality (330 mosmol kg-1) and 0.30 mmol l-1 taurine was mediated by a saturable system (Vmax = 0.689 nmol g-1 dry mass min-1; Km = 0.47 mmol l-1). The influx was inhibited by taurine analogues, but was not significantly affected by reduced osmolality. This saturable influx(More)
The potential role of taurine transport associated with volume regulation in renal tissue and isolated proximal renal tubules was studied in the teleost Carassius auratus (goldfish). The cellular taurine content in renal tissue fragments incubated in isosmotic solution (290 mOsm) (7.8 +/- 0.9 (SD) micromol g wet wt(-1)) decreased by 60% following exposure(More)
In brown trout surviving in acidified brook water, the plasma osmolality is reduced 15-25%. The decrease is much less than that expected from the measured reduction in the plasma concentration of Na+ and Cl-. This discrepancy cannot quantitatively be explained by the increase in plasma concentration of K+ (100%) and free amino compounds (mainly taurine;(More)
After injection of 3H-taurine into eyeballs of frogs and maintenance for 3 h in darkness by a gentle shaking, an almost homogenous fraction of rod outer segments (ROS) was prepared. About a 22% decrease in tonicity caused by reducing NaCl in isotonic 225 mOsm normal solution caused a rapid increase in the rate coefficient of efflux of 3H-taurine from the(More)