Abstract

In bovine brain cortex cytoplasm we have identified a soluble protein (L-protein) of M r ∼90 kDa interacting with polyclonal antibodies to α-latrotoxin. The L-protein forms potential-dependent and cation-selective ion channels in BLM, which are blocked by Cd 2+. The fusogenic activity of the L-protein was demonstrated on liposomes. We have arrived at the conclusion that the action mechanisms of the L-protein and α-latrotoxin are similar.

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