... + /H + antiporters active transport membrane proteins Every cell and organelle is separated from its environment by a membrane with a dual function; on the one hand, it is impermeable to solutes and protects the cell or organelle from its environment; on the other hand,embedded...

... to those in the DMSO carrier control medium. Values are means± s.e.m. sodium uptake kinetics pallial fluid chemistry hemolymph ion transport active transport osmoregulation © The Company of Biologists Limited 2008 2008 12 11 2007 * Author for correspondence (e...

... to steady-state intracellular accumulation of solute when the electrochemical potentials of activator ion and solute are energetically coupled. Secondary active transport can occur if an appropriate physical coupling mechanism exists in the membrane. Driving forces for secondary active transport...

... in the y subunit suggests that this subunit has an essential role in coupling catalysis with proton translocation. * To whom reprint requests should be addressed. © 1992 by Company of Biologists 1992 ATP synthase glycine-rich sequence active transport coupling The ATP...

... generation which links electrogenic K + transport into the goblet cavities with net alkalinization of the lumen of the anterior and middle midgut regions. Although primary or secondary active transport seems likely in the generation of an alkaline lumen, there is a simpler physical explanation...