TABLE V

Permeability Properties of Channels Formed by the 23-residue Tandem gA

SaltgA channels23-residue–linked tandem gA channels
i/pA
 (mean ± SDΔi1/pA
 (mean ± SD)Δi2/pA
 (mean ± SD)Δi2/Δi1(mean ± SEM)
100 mV
0.1 M CsCl1.57 ± 0.051.03 ± 0.051.16 ± 0.081.12 ± 0.01
1.0 M CsCl4.92 ± 0.303.57 ± 0.164.21 ± 0.151.17 ± 0.01
1.0 M NaCl1.31 ± 0.061.12 ± 0.041.30 ± 0.081.17 ± 0.02
200 mV
0.1 M CsCl2.40 ± 0.241.43 ± 0.091.54 ± 0.111.06 ± 0.01
1.0 M CsCl10.04 ± 0.205.69 ± 0.276.83 ± 0.251.21 ± 0.01
1.0 M NaCl3.02 ±0.152.11 ± 0.112.42 ± 0.081.14 ± 0.01
  • The results for Δi1 and Δi2 are based on composite appearance and disappearance transitions, as well as flickery and intermediate events. The results for Δi2i1 are based on the ratios of the current transitions in individual composite appearance and disappearance events.