... in the activity of basolateral Na + /K + -ATPase (NKA) and apical V-type H + -ATPase (VA) and (2) region-specific Na + and K + flux rates. Both indicate a prominent role for the hindgut (rectum) in K + reabsorption. MTs also exhibit region-specific differences in Na + and K + flux rates that are coupled...

... reduced NH 3 /NH 4 + excretion rates, but they returned to control values following 24 h acclimation. These mussels had increased abundance of V-type H + -ATPase in the apical membranes of plicate organ cells; however, NH 3 /NH 4 + excretion rates were not affected by the V-type H + -ATPase specific...

... in the anal papillae suggests that, in addition to AeAmt1, the ionomotive pumps V-type H + -ATPase and Na + /K + -ATPase as well as NHE3 are involved in ammonia excretion at the anal papillae. * Author for correspondence ( adonini@yorku.ca ) Competing interests The authors declare no competing...

... as an osmoconformer in seawater). Additionally, expression of ion transporters and supporting enzymes that typically undergo upregulation during salinity transfer in osmoregulatory gills (i.e. Na + /K + -ATPase, carbonic anhydrase, Na + /K + /2Cl − cotransporter, V-type H + -ATPase and arginine kinase) were generally...

... + -K + -ATPase (NKA) and V-type H + -ATPase (VA) in the alimentary canal, and (2) rectal K + transport with the scanning ion-selective electrode technique (SIET). NKA and VA activity were measured in four distinct regions of the alimentary canal as follows: the combined foregut and anterior midgut...

... of organic anions across the brush-border membrane in the human kidney proximal tubule ( Leier et al., 2000 ), and a similar situation could exist in tardigrades and insects. Our data tentatively suggest that the V-type H + -ATPase, and perhaps also the Na + /K + -ATPase, provide the driving force...

... at the apical membrane occurs through a Na + channel that is driven by a V-type H + -ATPase and that Cl – uptake occurs through a Cl – /HCO 3 – exchanger, with carbonic anhydrase providing H + and HCO 3 – to the V-type H + -ATPase and exchanger, respectively. * Author for correspondence ( adonini@yorku.ca...

...( Hirata et al., 2003 ; Ivanis et al., 2008a ) while active H + secretion is driven by the V-type H + -ATPase( Perry and Fryer, 1997 ; Perry et al., 2000 ; Perry et al., 2003a ; Hirata et al., 2003 ). The mRNA levels for both the V-ATPase and NHE3 genes are increased during acidification induced...

... for a successful terrestrial invasion. Crabs can actively uptake or excrete ions upon salinity change, and the gills play a major role among the osmoregulatory organs. Several enzymes are involved in the osmoregulatory process, including Na + ,K + -ATPase and V-type H + -ATPase (V-H + -ATPase). Na + ,K + -ATPase...

...Marjorie L. Patrick; Karlygash Aimanova; Heather R. Sanders; Sarjeet S. Gill SUMMARY This study describes the expression patterns of P-type Na + /K + -ATPase and V-type H + -ATPase in the larval and adult forms of the mosquito Aedes aegypti and provides insight into their relative importance in ion...

... Limited 2005 2005 Na + /K + -ATPase Na + /K + /2Cl - cotransporter V-type H + -ATPase arginine kinase crab gill gene expression quantitative PCR Physiological mechanisms by which euryhaline organisms adapt to changing salinities remain largely unexplored at the molecular level...

... The Company of Biologists Limited 2004 2004 osmoregulation crab Dilocarcinus pagei gill epithelia phylogenetic analysis NaCl uptake Na + /K + -ATPase V-type H + -ATPase transepithelial voltage short-circuit current ouabain concanamycin Freshwater crustaceans, fish and amphibians...

...Xing-He Weng; Markus Huss; Helmut Wieczorek; Klaus W. Beyenbach SUMMARY The V-type H + -ATPase is thought to provide the driving force for transepithelial electrolyte and fluid secretion in Malpighian tubules. To confirm the presence of this proton pump in Malpighian tubules of the yellow fever...

... of the Na + /H + exchanger and Na + channels. Combined with an analysis of gill morphology, the strong intracellular but weak apical abundance of V-type H + -ATPase and the fact that ammonia flux rates are equal under buffered and unbuffered experimental conditions, our observations suggest a hypothetical...