label: voltage-gated calcium channel activity involved in positive regulation of presynaptic cytosolic calcium levels
label_lc: voltage-gated calcium channel activity involved in positive regulation of presynaptic cytosolic calcium levels
description: "Positive regulation of presynaptic cytosolic calcium ion concentrations via the directed movement of calcium ions across the plasma-membrane into the cytosol via the action of voltage-gated calcium ion channels. This is the first step in synaptic transmission."