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@ARTICLE{Sreij:844929,
      author       = {Sreij, Ramsia and Dargel, Carina and Geisler, Philippe and
                      Hertle, Yvonne and Radulescu, Aurel and Pasini, Stefano and
                      Perez, Javier and Moleiro, Lara H. and Hellweg, Thomas},
      title        = {{DMPC} vesicle structure and dynamics in the presence of
                      low amounts of the saponin aescin},
      journal      = {Physical chemistry, chemical physics},
      volume       = {20},
      number       = {14},
      issn         = {1463-9084},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2018-02271},
      pages        = {9070 - 9083},
      year         = {2018},
      abstract     = {Vesicle shape and bilayer parameters are studied by
                      small-angle X-ray (SAXS) and small-angle neutron (SANS)
                      scattering in the presence of the saponin aescin. We confirm
                      successful incorporation of aescin molecules by analysis of
                      the radii of gyration RG and study furthermore the impact of
                      aescin incorporation on bilayer thickness parameters from
                      the neutron and X-ray perspective. Additionally, the bending
                      elasticity (κ) of these
                      1,2-dimyristoyl-sn-glycero-3-phosphocholine vesicle bilayers
                      is studied in the presence of aescin. Neutron spin-echo
                      spectroscopy (NSE) allows to detect subtle changes in the
                      dynamics and κ of lipid membranes. Changes of κ are
                      detectable at temperatures below and above the main phase
                      transition temperature Tm of the lipid. The impact of aescin
                      is much more significant below Tm. It has been found that
                      below Tm the addition of aescin to the vesicles decreases
                      the value of κ and softens the bilayer. Above Tm the value
                      of κ increases with increasing aescin content and the
                      bilayer becomes more rigid. Altogether, we demonstrate by
                      analysis of the structure and dynamics of the vesicles that
                      the impact of aescin strongly depends on the lipid state.
                      Below Tm the membrane becomes fluidized and softer, above Tm
                      solidified and stiffer compared to a DMPC membrane without
                      additive at similar conditions.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101 / EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29505043},
      UT           = {WOS:000429205700005},
      doi          = {10.1039/C7CP08027A},
      url          = {https://juser.fz-juelich.de/record/844929},
}