Stoichiometry of cholesterol-sphingomyelin condensed complexes in monolayers

Arun Radhakrishnan, Xin Min Li, Rhoderick E. Brown, Harden M. McConnell

Research output: Contribution to journalArticlepeer-review

64 Scopus citations


Some binary mixtures of cholesterol and phospholipids in monolayers have thermodynamic phase diagrams with two upper miscibility critical points. This feature has been interpreted in terms of 'condensed complexes' between the phospholipid and cholesterol. The present work gives evidence for the formation of complexes with a common simple integral stoichiometry in binary mixtures of cholesterol and a series of five sphingomyelins where the amide-linked acyl chain length is varied. This indicates that these complexes have a distinct geometry even though they form a liquid phase.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalBiochimica et Biophysica Acta - Biomembranes
Issue number1
StatePublished - Mar 9 2001


  • Critical point
  • Immiscibility
  • Liquid mixture
  • Membrane
  • Phase diagram

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology


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