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Disordering of phospholipid headgroups induced by a small amount of polyethylene oxide |
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| Authors: | Andrey Filippov Bulat Munavirov Bulat Gizatullin Oleg N Antzutkin |
| Institution: | 1. Kazan (Volga Region) Federal University, , 420008 Kazan, Russian Federation;2. Chemistry of Interfaces, Lule? University of Technology, , SE‐97187 Lule?, Sweden;3. Department of Physics, Warwick University, , CV4 7AL Coventry, UK |
| Abstract: | We present a 31P NMR spectroscopy study of planar glass‐plate‐oriented multi‐bilayers of dimyristoylphosphatidylcholine (DMPC) with addition of polyethylene oxide (PEO). This work revealed the presence of a new component in the spectra that appeared only with addition of a small fraction of PEO (up to one PEO segment per dimyristoylphosphatidylcholine molecule) and disappeared when larger amounts of PEO were added. We explained this phenomenon as an effect of an inhomogeneous force field induced by the PEO molecules located at a certain depth in the lipid membrane interface region. Copyright © 2012 John Wiley & Sons, Ltd. |
| Keywords: | NMR 31P lipid bilayers biomembranes polymer adsorption lipid phase |