![Figure 3. Conduction through Kir1.1 channels in inside-out patches with symmetrical NH4+ concentrations. (A) Inward currents with −100 mV across the patch at different [NH4+]. (B) i-V relationships for different [NH4+]. Lines through the data points have no theoretical meaning. (C) Single-channel currents at −100 mV as a function of ion concentration. The line represents the best fit of Eq. 1 to the data, with imax = 3.7 ± 0.1 pA and Km = 16 ± 3 mM. (D) imax and Km, measured as in C, as a function of voltage.](https://cdn.rupress.org/rup/content_public/journal/jgp/139/2/10.1085_jgp.201110727/4/jgp_201110727_fig3.jpeg?Expires=1767676491&Signature=OOEx-oyRkl-0A2pIdnkSlO2wdB6O9lBGYNjFLYeMCtxd7A7EyKXpXS74eWu4e6BbVPeIIWW9FTBOzkCkUkr9FSOE2VzilmWoZxMjFREQRYi5pZqf4H-iWFbMgUTlanKSxtxT~1ZBBGP2b4gYozpskeBuO2rjXt7BO18iCLEgjYJ1QN-VrNSoPqlI4sy0YVD1FyKC98lKIPXAzEgxDCToN0gdiw2Cyec1hrIYFO7wZ4G5Dpx4z3ePQ-8gDKJBXdzQxiAzXfQ3EwE1hY19hjYcZfA9bnj8ZCfHyMnJRleqNM5BiwcqXKr6WHyio0TCrBhlEsS~vVkrLX9R8iq5XUTA5A__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Figure 3.
Conduction through Kir1.1 channels in inside-out patches with symmetrical NH4+ concentrations. (A) Inward currents with −100 mV across the patch at different [NH4+]. (B) i-V relationships for different [NH4+]. Lines through the data points have no theoretical meaning. (C) Single-channel currents at −100 mV as a function of ion concentration. The line represents the best fit of Eq. 1 to the data, with imax = 3.7 ± 0.1 pA and Km = 16 ± 3 mM. (D) imax and Km, measured as in C, as a function of voltage.
