Table 1.

Voltage-dependent activation and inactivation parameters of K_v1.5, K_v1.5 + K_vβ1.3 and K_v1.5 + K_vβ1.3-calphostin C channels obtained after applying 250 ms prepulses

	Activation		Inactivation
	Vh (mV)	s (mV)	Vh (mV)	s (mV)	Degree of inactivation (%)
Kv1.5	−6.0 ± 0.7	5.2 ± 0.4	−1.3 ± 3.4	9.8 ± 1.6	18.0 ± 3.4
Kv1.5 + Kvβ1.3 control	−23.6 ± 2.4a	3.9 ± 0.2	−26.5	4.2	48.0 ± 3.0
Kv1.5 + Kvβ1.3-calphostin C	−15.3 ± 1.2b,c	6.0 ± 0.6b,c	−6.5 ± 1.81998	10.1 ± 1.11998	33.8 ± 2.2b,c

s, slope of the Boltzmann equation; V_h, half-inactivation voltage. Data represent the mean ± SEM of n > 7 experiments.

^aStatistically significant difference between K_v1.5 + K_vβ1.3 and K_v1.5.

^bStatistically significant difference between K_v1.5 + K_vβ1-calphostin C and K_v1.5 + K_vβ1.3-control channels.

^cStatistically significant difference between K_v1.5 + K_vβ1.3-calphostin C and K_v1.5 channels.