Structure of the subgel (Lc′) and gel (Lβ′) phases of oriented dipalmitoylphosphatidylcholine multibilayers

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Abstract

An X-ray study of highly oriented films of 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) in the Lc′ phase is presented. The data describe the physical characteristics of the hydrophilic phosphorylcholine headgroups and hydrocarbon chains in the Lc′ phase and show that the Lc′ → LβF phase transition is characterized by a change in hydrocarbon chain packing, tilt angle and direction. Also, 1D electron density profiles indicate that Lc′ and dry LβF bilayers differ significantly in the bilayer interface region from those in the LβI (molecular tilt toward nearest neighbors) and hydrated LβF (molecular tilt between nearest neighbors) phases.

Original languageEnglish
Pages (from-to)4141-4147
Number of pages7
JournalJournal of Physical Chemistry
Volume99
Issue number12
DOIs
StatePublished - 1995
Externally publishedYes

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