Journal article
The metastability of saturated phosphatidylcholines depends on the acyl chain length
Biochimica et biophysica acta. Biomembranes, v 855(3), pp 417-420
1986
PMID: 3947630
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Abstract
We report the peak temperatures and enthalpies of the main (gel to liquid crystal) transitions and ‘s-transitions’ of symmetric saturated PC's
(
C
n,
PC)
with
n varying from 12 to 22, where s-transition is defined as the transition between metastable and stable phases. The line for s-transition peak temperature versus
n (t = 1.98n – 16.0°C) the crosses the corresponding pre- and main-transition curves between
n = 12 and 14. We also find that the metastability pattern for lipids of
n less than 14 is different to that for
n greater than 14 (and is similar to that of the phosphatidylethanolamine analogs). For
n greater than 14 the enthalpy of the s-transition decreases with increasing
n and extrapolates to zero above
n = 20, implying that the s-(orthorhombic) and gel (quasi-hexagonal) phases become identical. That simultaneous gel-liquid crystal transition and metastability is restricted to the range
n = 12 to 20 may be correlated with the predominance in natural lipids of these acyl chain lengths.
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Details
- Title
- The metastability of saturated phosphatidylcholines depends on the acyl chain length
- Creators
- Leonard Finegold - Drexel UniversityMichael A. Singer - Queen's University
- Publication Details
- Biochimica et biophysica acta. Biomembranes, v 855(3), pp 417-420
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Web of Science ID
- WOS:A1986A654300010
- Scopus ID
- 2-s2.0-0023047920
- Other Identifier
- 991019173865604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Biochemistry & Molecular Biology
- Biophysics