[Cation selectivity of a BLM in a state of "stress"]

In asymmetric conditions (by electrolyte concentration) cyclic voltage current curves of BLM were measured in a stress state initiated after a short -- time effect of a strong electric field. BLM from negatively charged lipids were shown to exhibit notable cation -- anion selectivity under these conditions. The result obtained agrees with the assumption to the effect that stress and preclamping fluctuations are related to the formation of through pores the inner face of which is lined with the polar heads of lipids.