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Biophysical Journal 11: 995-1001 (1971)
© 1971 the Biophysical Society

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The Dipole Model and Phase Transitions in Biological Membranes

Silverio P. Almeida, James D. Bond and Thomas C. Ward

ABSTRACT

Assuming the dipole model for a membrane, approximate calculations are made which employ a dipole-dipole interaction energy. The calculations are based upon the assumption of cooperative coupling of membrane polar molecules and make use of the Bragg-Williams approximation. A theoretical estimate is made of the critical temperature at which phase changes might occur in certain biological membranes. Proposals are presented which explain how the dipole transition might relate to the sometimes observed thermal phase transitions in biological membranes.






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Copyright © 1971 by the Biophysical Society.