Document Detail


A theoretical model for lipid monolayer phase transitions.
MedLine Citation:
PMID:  1182167     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We present a theoretical model for the liquid-expanded to liquid-condensed phase transition observed in many phospholipid monolayer films. The total two-dimensional pressure in the model is the sum of the hydrocarbon chain pressure and the surface pressure. The hydrocarbon chain pressure is calculated in an exteded version of a model published earlier. The surface pressure results from a lowering of the surface tension in the monolayer over that of pure water, thus producing a force on a Langmuir float. When these two contributions are added, pi/A isotherms are obtained which have slope discontinuities very similar to those observed experimentally. The results indicate that a successful model for lipid phase behavior must consider the interactions between head groups and water as well as cooperative hydrocarbon chain melting.
Authors:
H L Scott
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  406     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1975 Oct 
Date Detail:
Created Date:  1976-01-30     Completed Date:  1976-01-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  329-46     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Binding Sites
Mathematics
Membranes, Artificial*
Models, Biological
Molecular Conformation
Molecular Weight
Phospholipids*
Pressure
Surface Properties
Thermodynamics
Water
Chemical
Reg. No./Substance:
0/Membranes, Artificial; 0/Phospholipids; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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