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. 1987 Oct;52(4):667–670. doi: 10.1016/S0006-3495(87)83260-5

Scanning calorimetry reveals a new phase transition in L-alpha-dipalmitoylphosphatidylcholine.

J L Slater 1, C Huang 1
PMCID: PMC1330061  PMID: 3676446

Abstract

We report a new phase transition in fully hydrated dispersions of dipalmitoylphosphatidylcholine (DPPC). This new transition, called the sub-subtransition, exhibits a transition enthalpy of 0.25 kcal/mol with a Tm at 6.8 degrees C. Unlike the subtransition, no extended low temperature incubation is required to observe the sub-subtransition. This new sub-subgel (SGII) phase may be a precursor to the subgel (SGI) phase, and this discovery is discussed in relation to the current knowledge regarding the polymorphic gel phases of both ester- and ether-linked lipids with identical acyl chains.

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Selected References

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