... regulation fish gill kidney gut V-type H + -ATPase Na + /H + exchanger Cl – /HCO 3 – exchanger Na + /HCO 3 – cotransporter CA isoforms The above discussion emphasizes the point that the diversity of CA isoforms and functions in fish is at least as great as that in tetrapods, if not more so...

... (e-mail: [email protected] ) 3 11 2008 2009 larval mosquito midgut alkalinization H + V-ATPase proton electrochemical gradient anion exchanger Na + /H + exchanger H + channel DIDS amiloride ouabain zinc The V-type H + ATPase, expressed at the plasma...

... + exchanger activity were examined. Cadmium (50 μmol l –1 ) caused a significant elevation of intracellular pH (pHi) and a rise (176%) of Na influx relative to control values. The amiloride analogue, EIPA (20 nmol l –1 ), a Na + /H + exchanger blocker,together with cadmium, significantly reduced the effect...

...-adrenergic receptor (β-AR) binding characteristics,β-adrenergically stimulated RBC Na + /H + exchanger(βNHE) activity, together with β-AR and βNHE mRNA levels and plasma steroid hormone and lactate levels. These parameters were measured at approximately monthly intervals in a single population of fish held...

...Maria E. Giannakou; Julian A. T. Dow SUMMARY The NHE family of Na + /H + exchangers is believed to play an essential role in animals, but may play an additional, specialised epithelial role in insects. The pharmacological sensitivity of the Drosophila melanogaster Malpighian tubule to a range...

... in erythrocytes of rainbow trout, Salmo gairdneri . J. Physiol., Lond . 382 , 123 – 144 . 10.1113/jphysiol.1987.sp016359 Cossins , A. R. and Kilbey , R. V. ( 1989 ). The seasonal modulation of Na + /H + exchanger activity in trout erythrocytes . J. Exp. Biol . 144 , 463 – 478...

... by the blockade of either Na + /H + exchange (using amiloride) or anion transport (using DIDS). The removal of external HCO 3 − and the abolition of outward K + diffusion by the channel blocker Ba 2+ also decreased the rate of proton extrusion following acid load. Depolarization of the cell membrane with 50 mmol...

... by the phosphatase inhibitor okadaic acid, may consist of the dephosphorylation of one of these two sites. Furthermore, Calyculin A (ClA), another specific protein phosphatase inhibitor, induces in unstimulated cells a Na + /H + exchange activity whose exchange properties are very different from those...

...A. R. Cossins; R. V. Kilbey ABSTRACT The effects of temperature upon the adrenergic Na + /H + exchange of rainbow trout erythrocytes have been studied in vitro . The initial rates of H + ejection and of increase of intracellular Na + ([Na + 1 ) in adrenergically stimulated cells were highly...