Anomalous swelling of multilamellar lipid bilayers in the transition region by renormalization of curvature elasticity

Thomas Hønger Callisen, Kell Mortensen, John Hjorth Ipsen, Jesper Lemmich, Rogert Bauer, Ole G. Mouritsen

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Abstract

Small-angle neutron scattering is used to determine the temperature dependence of the lamellar repeat distance in an aqueous multilamellar solution of phospholipid bilayers. A thermal anomaly in the swelling behavior is observed at the bilayer phase transition. The anomalous behavior can be suppressed by varying the lipid acyl-chain length or by alloying with a molecular stiffening agent. The experimental results are explained in terms of renormalization of the bilayer curvature elasticity and by using a theory of repulsive interlamellar undulation forces.
Original languageEnglish
JournalPhysical Review Letters
Volume72
Issue number24
Pages (from-to)3911-3914
ISSN0031-9007
DOIs
Publication statusPublished - 13 Jun 1994

Bibliographical note

Copyright (1994) by the American Physical Society.

Keywords

  • FLUCTUATIONS
  • SYNCHROTRON X-RAY
  • MEMBRANES
  • PHASE-TRANSITION
  • LAMELLAR PHASES
  • PHYSICAL-PROPERTIES
  • STERIC INTERACTIONS
  • LIQUID-CRYSTAL
  • DEPENDENCE
  • NEUTRON-DIFFRACTION

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