Table 2.
Parameters of the K+ dependence of rectification in Kir2.1–3 channels at 30 μM spermine
| k0 | k2 | Z0 | Z2 | V01/2 (0 mV) | V21/2 (0 mV) | |
|---|---|---|---|---|---|---|
| Kir2.1 | 0.98 ± 0.01 | 1.04 ± 0.02 | 5.6 ± 0.1 | 3.2 ± 0.1 | −6.4 ± 0.3 | 29.5 ± 1.0 |
| Kir2.2 | 0.98 ± 0.03 | 1.01 ± 0.06 | 6.7 ± 0.1 | 2.9 ± 0.1 | −6.4 ± 1.8 | 19.7 ± 2.9** |
| Kir2.3 | 1.04 ± 0.04 | 1.01 ± 0.08 | 5.2 ± 0.3 | 2.0 ± 0.1 | −10.1 ± 2.1 | 39.0 ± 4.1** |
Data were obtained from outside-out patches at different external K+ concentrations. V01/2 (at 0 mV) and V21/2 (at 0 mV) values are derived from linear fits to data in Fig. 3 extrapolated to 0 mV.
**
P < 0.01.