Table 1.

Parameters of rectification in Kir2.1–3 channels in high extracellular K⁺ at 300 μM spermine

	Z0	Z1	V01/2	V11/2	n
Kir2.1	5.0 ± 0.2	1.4 ± 0.1	−23.4 ± 1.0	−64.6 ± 4.3	7
Kir2.2	5.9 ± 0.2*	1.5 ± 0.1	−22.4 ± 0.3	−75.5 ± 1.9	4
Kir2.3	5.2 ± 0.1	1.7 ± 0.1	−24.6 ± 0.4*	−52.2 ± 0.8**	9†

n is number of cells

^†Only 3 cells expressing Kir2.3 channels at a level suitable for reliable analysis are included. The remaining 6 cells expressed Kir2.3-YFP fusion channels. The presence of a YFP tag dramatically facilitates selection of highly expressing cells. There was no measurable difference in any parameter between the two channel constructs, and thus the data were pooled together

^*P < 0.05

^**P < 0.01 compared to Kir 2.1