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The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines.

Publication ,  Journal Article
McIntosh, TJ; Lin, H; Li, S; Huang, C
Published in: Biochim Biophys Acta
February 9, 2001

Previous studies from our laboratories have delineated the relationship between the acyl chain asymmetry of mixed-chain phosphatidylcholines, C(X):C(Y)PC, and the effect of ethanol concentration, [EtOH], on the main phase transition temperature, T(m), and the phase structure of the lipid bilayer composed of C(X):C(Y)PC using differential scanning calorimetry and X-ray diffraction techniques [Huang and McIntosh, Biophys. J. 72 (1997) 2702--2709]. In the present work, we have extended these studies to characterize the effect of [EtOH] on the T(m) and the phase structure of the lipid bilayer composed of sn-1 saturated/sn-2 monounsaturated phosphatidylcholines with various positions of the cis double bond. Specifically, five positional isomers of 1-eicosanoyl-2-eicosenoyl-sn-glycero-3-phosphocholines, C(20):C(20:1 Delta(n))PC with n=5, 8, 11, 13 and 17, were synthesized and studied. For C(20):C(20:1 Delta(n))PC with n=5 and 8, results from the calorimetric experiments showed that in response to various concentrations of ethanol, the change in T(m) of the lipid bilayer composed of monounsaturated lipids was characterized by a sigmoidal or biphasic profile in the plot of T(m) versus [EtOH]. In contrast, a continuous depression of the T(m) by ethanol was observed calorimetrically for C(20):C(20:1 Delta(n))PC with n> or =11. The X-ray diffraction experiments further demonstrated that C(20):C(20:1 Delta(5))PC and C(20):C(20:1 Delta(8))PC can undergo the ethanol-induced gel-to-fully interdigitated phase transition at T

Duke Scholars

Published In

Biochim Biophys Acta

DOI

ISSN

0006-3002

Publication Date

February 9, 2001

Volume

1510

Issue

1-2

Start / End Page

219 / 230

Location

Netherlands

Related Subject Headings

  • X-Ray Diffraction
  • Temperature
  • Phosphatidylcholines
  • Molecular Structure
  • Molecular Conformation
  • Lipid Bilayers
  • Isomerism
  • Ethanol
  • Calorimetry, Differential Scanning
  • 51 Physical sciences
 

Citation

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McIntosh, T. J., Lin, H., Li, S., & Huang, C. (2001). The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines. Biochim Biophys Acta, 1510(1–2), 219–230. https://doi.org/10.1016/s0005-2736(00)00352-7
McIntosh, T. J., H. Lin, S. Li, and C. Huang. “The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines.Biochim Biophys Acta 1510, no. 1–2 (February 9, 2001): 219–30. https://doi.org/10.1016/s0005-2736(00)00352-7.
McIntosh TJ, Lin H, Li S, Huang C. The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines. Biochim Biophys Acta. 2001 Feb 9;1510(1–2):219–30.
McIntosh, T. J., et al. “The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines.Biochim Biophys Acta, vol. 1510, no. 1–2, Feb. 2001, pp. 219–30. Pubmed, doi:10.1016/s0005-2736(00)00352-7.
McIntosh TJ, Lin H, Li S, Huang C. The effect of ethanol on the phase transition temperature and the phase structure of monounsaturated phosphatidylcholines. Biochim Biophys Acta. 2001 Feb 9;1510(1–2):219–230.

Published In

Biochim Biophys Acta

DOI

ISSN

0006-3002

Publication Date

February 9, 2001

Volume

1510

Issue

1-2

Start / End Page

219 / 230

Location

Netherlands

Related Subject Headings

  • X-Ray Diffraction
  • Temperature
  • Phosphatidylcholines
  • Molecular Structure
  • Molecular Conformation
  • Lipid Bilayers
  • Isomerism
  • Ethanol
  • Calorimetry, Differential Scanning
  • 51 Physical sciences