GO:0086063

voltage-gated sodium channel activity involved in regulation of SA node cell action potential

Details: 
Catalysis of the transmembrane transfer of a sodium ion by a voltage-gated channel through the plasma membrane of an SA node cardiac muscle cell contributing to the depolarization phase of an action potential. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded. [GOC:BHF, GOC:mtg_cardiac_conduct_nov11]
Evidence Code: 
IMP