Table 1.

Kinetic parameters of native and cloned K⁺ channels

	Type 1	TASK-1	Type 2	TASK-3	Type 3	TREK-2	Type 4
Conductance (pS)
60 mV	8.6 ± 1.1	9.2 ± 1.1	16.3 ± 1.2	17.1 ± 1.4	67 ± 8	65 ± 6	30 ± 2
−60 mV	15.6 ± 1.3	16.2 ± 1.3	33.0 ± 2.4	36.0 ± 2.4	107 ± 7	104 ± 6	32 ± 2
Mean open time (ms)
(−60 mV)	0.7 ± 0.1	0.8 ± 0.1	1.7 ± 0.1	1.8 ± 0.1	0.9 ± 0.1	1.0 ± 0.1	2.4 ± 0.2

Each value represents the mean ± s.d. of 3–6 values. When values determined for the Type 1 K⁺ channel and TASK-1, the Type 2 K⁺ channel and TASK-3, and the Type 3 K⁺ channel and TREK-2 were compared, none was significantly different from each other (P > 0.05). For more details, see text.