On the stability of the ripple phase in the DPPC/PLPC/water ternary system

On the stability of the ripple phase in the DPPC/PLPC/water ternary system

Checchetti A; Chidichimo G; Golemme A; Grasso D; Imbardelli D; LaRosa C; Nicoletta F P; Westerman P W

Chemistry and Physics of Lipids

1997

1997-11

The effect of incorporation of 1-palmitoyl-sn-glycero-3-phosphocholine (PLPC) on the structure of the P-beta' ripple mesophase in aqueous dispersions of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) has been studied by differential scanning calorimetry (DSC) and scanning dilatometry (SD). For samples containing 34 wt. % (H2O)-H-2 and 0-15 wt. % PLPC, a pretransition was observed by DSC. The pretransition disappears at 15 wt. % PLPC. The behavior of thermodynamic functions at the pretransition and main transition gives new insights on the structural changes produced by PLPC on bilayers of DPPC. (C) 1997 Elsevier Science Ireland Ltd.

Biophysics; Biochemistry & Molecular Biology; gel; cholesterol; lysolecithin; membranes; nuclear-magnetic-resonance; water; transition; lipid bilayers; phospholipid-bilayers; Lipids; differential scanning calorimetry (DSC); lecithin; phosphatidylcholine; phosphatidylcholine bilayers; pretransition; scanning dilatometry (SD)

Journal Article or Conference Abstract Publication

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