Effect of gramicidin S on the dipalmitoylphosphatidyl-glycerol thermotropic phase transition in DPPG/GS systems: A mathematical approach

Stan, Cristina; Cristescu, C.; Severcan, FERİDE; Dorohoi, Dana

doi:10.1080/15421400500447116

Effect of gramicidin S on the dipalmitoylphosphatidyl-glycerol thermotropic phase transition in DPPG/GS systems: A mathematical approach

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Stan C., Cristescu C. P., Severcan F., Dorohoi D.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, vol.457, pp.27-41, 2006 (SCI-Expanded)

Publication Type: Article / Article
Volume: 457
Publication Date: 2006
Doi Number: 10.1080/15421400500447116
Journal Name: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Page Numbers: pp.27-41
Middle East Technical University Affiliated: No

Abstract

We present a mathematical approach to the experimental data recorded via Fourier transform-infrared spectroscopy regarding the influence of the concentration of the antimicrobial peptide gramicidin S (GS) on the thermotropic phase transition of the dipalmitoylphosphatidyl-glycerol (DPPG) lipid bilayer membrane in DPPG/GS systems. The model is based on the influence of the GS concentration on the parameters of a nonlinear damped oscillator, which models the CH2 symmetric stretching band.