Capacitive and ionic currents in BLM from phosphatidic acid in Ca2+-induced phase transition.
The development of electric current with time in a bilayer lipid membrane (BLM) formed from dipalmitoylphosphatidic acid on introducing Ca2+ ions into the medium was studied at constant temperature and pH. The phase transition in the Ca2+-induced BLM is accompanied by the initial capacitive current followed by the occurrence of single ionic channels. The amount of transported charges in the capacitive current is 5 C/ microF. The conductivity of the single ionic channels ranges from 50 to 100 pSm.
D002118:Calcium; D008051:Lipid Bilayers; D008564:Membrane Potentials; D008956:Models, Chemical; D010712:Phosphatidic Acids; D013816:Thermodynamics
D008051:Lipid Bilayers; D010712:Phosphatidic Acids; C031599:dipalmitoylphosphatidic acid; D002118:Calcium