“In the presence of Cd2+ , the effect of SP on membrane potential and AHP was reduced.”
“ SP (… Cd2+ (20-200 μM) or the high-voltage-activated Ca2+ channel blocker ω-conotoxin (10 μM) blocked SP's inhibitory effects on I K. This … inhibition of I K(Ca) and that this may occur, in part, via a reduction of Ca2+ influx through voltage-dependent Ca2+ channels.”