Filippov A, Munavirov B, Gizatullin B, Antzutkin ON. Disordering of phospholipid headgroups induced by a small amount of polyethylene oxide.
MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013;
51:1-3. [PMID:
23132677 DOI:
10.1002/mrc.3900]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 10/12/2012] [Accepted: 10/17/2012] [Indexed: 06/01/2023]
Abstract
We present a (31)P 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.
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