Table 1. Conformational states of prokaryotic channel crystal structures.

Parameter	NavMs	NavAb	NavAb	NavRh	NavMs (pore)	NavAe1 (pore)	CavAb
Apparent state	open/ activated	closed/ preactivated	closed/ inactivated	closed/ inactivated	open/-	closed/-	closed/ preactivated
VS	activated	preactivated	preactivated	preactivated	none	none	preactivated
Pore gate	open	closed	closed	closed	open	closed	closed
SF	open - Na ions	open - no ions	collapsed	collapsed	open - Na ions	open - no Na	open - Ca ions
CTD	visible - interaction	not visible	not visible	not visible	not visible	visible - coiled-coil	visible - coiled-coil
Conducts Na+	yes	yes	yes	no	yes	no	NA