Table 1.

Comparison of functional properties of K⁺current components in BC and PC patches

	BCs	PCs	p
Total peak conductance density	175 ± 11 pS μm⁻²	95 ± 6 pS μm⁻²	<0.001*
Fast delayed rectifier	58 ± 6%	12 ± 4%	<0.001*
	(33–72%)	(1–22%)
Activation curve
midpoint V	−7.1 ± 0.9 mV	−12.1 ± 1.2 mV	<0.005
k	11.5 ± 0.8 mV	10.0 ± 1.0 mV	>0.1
	(14)	(9)
Slow delayed rectifier	26 ± 5%	27 ± 4%	>0.5
	(14–40%)	(16–42%)
Activation curve
midpoint V	3.3 ± 4.9 mV	−7.5 ± 5.8 mV	>0.05
k	17.3 ± 1.5 mV	26.3 ± 1.8 mV	<0.005
	(9)	(9)
Inactivation curve
midpoint V	−63.8 ± 6.2 mV	−70.0 ± 3.4 mV	>0.1
k	11.1 ± 2.0 mV	7.8 ± 1.7 mV	>0.5
noninact. comp.	(37 ± 5%)	(16 ± 2%)	>0.05
	(9)	(10)
A-type	17 ± 4%	61 ± 4%	<0.001*
	(6–24%)	(52–84%)
Activation curve
midpoint V	−6.2 ± 3.3 mV	−3.0 ± 3.6 mV	>0.5
k	23.0 ± 0.7 mV	27.0 ± 0.5 mV	<0.05
	(9)	(11)
Inactivation curve
midpoint V	−75.5 ± 2.5 mV	−77.3 ± 3.2 mV	>0.5
k	8.5 ± 0.8 mV	7.4 ± 0.4 mV	>0.5
	(9)	(17)
τ recovery from inactivation	30.1 ± 6.4 msec	22.8 ± 2.7 msec	>0.1
	(22 ± 4%)	(64 ± 3%)	<0.001*
	165 ± 49 msec	314 ± 80 msec	>0.1
	(55 ± 5%)	(16 ± 3%)	<0.001*
	(5)	(6)

Values indicate mean, SEM, and total number of nucleated patches (in parentheses). Highly significant differences between BCs and PCs are indicated by asterisks. Activation curves were fitted with Boltzmann equations raised to fourth power, and inactivation curves were fitted with simple Boltzmann functions.