Table 1.

Energetic barriers for ion conduction in KcsA and KirBac

Conduction mechanism	Conduction direction	KcsA, kcal/mol	KirBac, kcal/mol
KWK	Outward	2.40 ± 0.48	2.81 ± 0.56
	Inward	3.75 ± 0.67	2.72 ± 0.30
KK	Outward	2.53 ± 0.20	2.10 ± 0.78
	Inward	2.24 ± 0.40	2.60 ± 0.20