Peptide liposomes from amphiphilic amino acids

Neumann, R.; Ringsdorf, Helmut

doi:10.1021/ja00263a021

Cited by 49 publications

(24 citation statements)

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“…One may also use some other surfactants possessing an ionic group and one, two or three hydrocarbon chains, for example dihexadecylphosphate (DHP) [21][22][23] (see Fig. 1 b) and others [24][25][26][27][28][29][30][31][32].…”

Section: Preparation and Structure Of Vesiclesmentioning

confidence: 99%

“…(28) and (30)) decreases drastically since the recombination reaction effectively competes with the transmembrane diffusion of the carrier. The quantum yield of PET across membrane under these conditions is: = ~okt/2(kt + k~) = *orl/2, (32) where • o = 15% is the quantum yield in the presence of EDTA and q = kt/(kt + kr) is the efficiency of the charge separation.…”

Section: Photopassive Membranesmentioning

confidence: 99%

See 1 more Smart Citation

Photoinduced electron transfer across membranes

Lymar

Parmon

Zamaraev

1991

Topics in Current Chemistry

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Section: Preparation and Structure Of Vesiclesmentioning

confidence: 99%

Section: Photopassive Membranesmentioning

confidence: 99%

Photoinduced electron transfer across membranes

Lymar

Parmon

Zamaraev

1991

Topics in Current Chemistry

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“…doi:10. 1016/j.chemphyslip.2004.11.001 or more amino acids) of various types have been investigated in recent years to help better understand membrane biophysics (Kunitake, 1992;Ringsdorf et al, 1988), as a platform for biomaterials development (Neumann and Ringsdorf, 1986;Winger et al, 1996;Yu et al, 1996;Dori et al, 2000;Hartgerink et al, 2001), and also as a means to anchor functional units to surfaces for intermolecular force measurements (Israelachvili, 1992;Berndt et al, 1995b;Pincet et al, 1994). An important feature of many of these lipids is the competition between hydrophobic and hydrophilic interactions.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and structural characterization of amino acid-linked dialkyl lipids

Tristram-Nagle

Lewis

Blickenstaff

et al. 2005

Chemistry and Physics of Lipids

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Using differential scanning calorimetry (DSC), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), we determined some thermodynamic and structural parameters for a series of amino acid-linked dialkyl lipids containing a glutamic acid-succinate headgroup and di-alkyl chains: C12, C14, C16 and C18 in CHES buffer, pH 10. Upon heating, DSC shows that the C12, C14 and annealed C16 lipids undergo a single transition which XRD shows is from a lamellar, chain ordered subgel phase to a fluid phase. This single transition splits into two transitions for C18, and FTIR shows that the upper main transition is predominantly the melting of the hydrocarbon chains whereas the lower transition involves changes in the headgroup ordering as well as changes in the lateral packing of the chains. For short incubation times at low temperature, the C16 lipid appears to behave like the C18 lipid, but appropriate annealing at low temperatures indicates that its true equilibrium behavior is like the shorter chain lipids. XRD shows that the C12 lipid readily converts into a highly ordered subgel phase upon cooling and suggests a model with untilted, interdigitated chains and an area of 77.2A(2)/4 chains, with a distorted orthorhombic unit subcell, a=9.0A, b=4.3A and beta=92.7 degrees . As the chain length n increases, subgel formation is slowed, but untilted, interdigitated chains prevail.

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“…1). A large number of lipids carrying polymerizable moieties have been shown to successfully stabilize vesicles through the formation of polymeric networks [12][13][14][15]. However, the preparation of robust vesicles is not the only feature of polymerizable vesicles.…”

Section: Introductionmentioning

confidence: 99%