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Electric Field Increases the Phase Transition Temperature in the Bilayer Membrane of Phosphatidic Acid by V.F. Antonov; E.Yu. Smirnova; E.V. Shevchenko is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Electric Field Increases the Phase Transition Temperature in the Bilayer Membrane of Phosphatidic Acid about?

The effect of the electric field on the phase transition temperature (Tc) of acidic 1,2-dipalmitoyl-sn-glycero-3-phosphate (DPPA) and 1,2-dipalmitoyl-sn-glycero-3-thionphosphate (thion-DPPA) and zwitterion, i.e. 1,2-dipalmitoyl-rac-3-phosphocholine and 1,2-distearoyl-rac-glycero-3-phosphocholine (DPPC and DSPC), lipids has been investigated. The phase transition was detected using the jump-like increase effect in the conductance of the planar bilayer membrane. A voltage increase to 150 mV has been shown to increase the phase transition temperature in a bilayer lipid membrane (BLM) of phosphatidic acids (DPPA and thion-DPPA) by 8-12 degrees C while the transition temperature in the bilayer of zwitterion lipids (DPPC and DSPC) increases insignificantly. The increasing of Tt in BLM of acidic lipids is attributed to the voltage-induced changes in the molecule packing density.

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Author

V.F. Antonov; E.Yu. Smirnova; E.V. Shevchenko

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-3084)

Published

1990

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)