[Conductance of model proteolipid membranes].
Artificial membranes were reconstructed from differently purified proteolipids (PL) of cattle brain white matter. The related lipids had different quantitative (72, 50-45 and 15-8%) and qualitative content. Conductance of the artificial membranes of all three types of PL in 0.1 M solutions of alkaline metal chlorides were 2-3 orders above that of bilayer membrane of lecithin and brain phospholipids. In all the cases the PL membranes with 85-92% protein content had the highest conductance, and those with 28% protein content--the lowest. Introduction of liposomes of PL and lecithin mixture to one side of the bilayer lecithin membrane brought about a gradual increase of its conductance up to a definite high level. The membranes made of all three types have specific conductance to monovalent cations which are arranged in the following order: Na+ greater than K+ greater than Cs+ greater than Li+.
D000818:Animals; D001923:Brain Chemistry; D002414:Cations, Monovalent; D002417:Cattle; D004553:Electric Conductivity; D008051:Lipid Bilayers; D008081:Liposomes; D008567:Membranes, Artificial; D010713:Phosphatidylcholines; D011510:Proteolipids / Q000302:isolation & purification
D002414:Cations, Monovalent; D008051:Lipid Bilayers; D008081:Liposomes; D008567:Membranes, Artificial; D010713:Phosphatidylcholines; D011510:Proteolipids
Provodimost' model'nykh belkovo-lipidnykh membran.