Effect of sarcoplasmic reticulum (sr) calcium content on sr calcium release elicited by small voltage-clamp depolarizations in frog cut skeletal muscle fibers equilibrated with 20 mm egta...3.5–3.9 μm; 14–16°C) were mounted in a double Vaseline-gap chamber and equilibrated with an external solution that contained tetraethyl ammonium– gluconate and an internal solution that contained Cs as the principal cation, 20 mM EGTA, and 0 Ca....
Cloning and characterization of a potassium-coupled amino acid transporter... K(+), Na(+), and to a lesser extent Li(+ )were accepted as cotransported ions, but K(+ )is the principal cation, by far, in living caterpillars....
The dependence on external cation of sodium and potassium fluxes across the human red cell membrane at low temperatures.... In media containing any of a variety of organic compounds as the principal cation (choline, N-methyl-D-glucamine (NMDG), arginine, L-lysine and trimethyl-phenylammonium), the ouabain plus bumetanide-insensitive influxes and effluxes of Na and...
Mechanisms of glutamate-stimulated mg2+ influx and subsequent mg2+ efflux in rat forebrain neurones in culture.... In whole-cell recordings made with NMDG as the principal cation in the patch pipette, application of NMDA plus glycine in the 70 mM Mg2+ extracellular solution induced inward currents at voltages more negative than +15 mV....
