Larger Image Figure 6. Monovalent alkali cation selectivity. (A) I-V relationships with NaCl replaced by LiCl, RbCl, or CsCl. All solutions were nominally Ca2+ free. (B) I-V relationships with Na+ replaced by KCl, RbCl, or NMDG·Cl in the absence of Ca2+. Currents were normalized to values obtained at Vm = −100 mV with 110 mM NaCl. Data represent means ± SEM for 5–13 measurements. (C) Values of Gx/GNa obtained from ratios of inward slope conductance in A and B. Values of Px/PNa were obtained from the shift in reversal potential in A and B. Image published in: Yang L and Palmer LG (2014) © 2014 Yang and Palmer. Creative Commons Attribution-NonCommercial-ShareAlike license Permanent Image Page Printer Friendly View XB-IMG-138085