β-latroinsectotoxin binds with high affinity to insects presynaptic membranes, stimulates neurotransmitter release from nerve endings, increases intracellular Ca2+ concentration; the biological activity on nerve endings occurs at 10-10-10-9 M.

Can be stored at 4 °C in presence of sodium azide up to 0.5 mg/ml during one month without any loss of activity or protein aggregation; a small amount of the lyophilized product cannot be dissolved; repeating thawings and freezings causes a partial loss o