Vesicle transformation

Matrix effect in oleat-micelles-vesicles transformations. Orig. Life Evol. 

Wick, R, Angelova, M. L, Walde, P. et al. (1996). Microinjection into giant vesicles and light microscopy investigation of enzyme-mediated vesicle transformations. 

Bernheim-Groswasser. A. Zana, R. Talmon, Y. Micro- 30. structures in aqueous solutions of mixed dimeric surfactants Vesicle transformation into networks of thread-like micelles. J. Phys. Chem.. B 2000. 104. 12192-12201. and references therein. 

Figure 3 Morphological phases and vesicle transformations in dilute solutions, (a) Phase diagram of PS310-PAA52 in dioxane plus water. The colored regions between sphere and rod phases and between rod and vesicle phases correspond to coexistence regions, (b) Reversibility of the vesicle formation and growth process for PS300-PAA44, presumably based on part of fusion and fission processes illustrated in (c). (Reproduced with permission from Ref. 14a. American Association for the Advancement of Science, 2002.)...

III. KINETIC STUDIES OF THE VESICLE-TO-MICELLE AND MICELLE-TO-VESICLE TRANSFORMATIONS... 

Figure 6.13 Disklike micelle D and disjoined disklike micelle D postulated as intermediate states in the micelle-to-vesicle transformation. Reproduced from Reference 97 with permission of lOP Publ.

Figure 6.14 Possible intermediate structures occurring during the micelle-to-vesicle transformation for the SOS/CTAB system. (A) SOS monomers and CTAB micelles (In the experimental conditions used the number of SOS micelles was low and SOS micelles are not shown) (B) nonequilibrium mixed micelles (C) floppy, irregularly shaped mixed micelles (D) nonequilibrium vesicles and (E) final vesicles. Reproduced from Reference 103 with permission of the American Chemical Society.

Grille, Kats, and Muratov have recently used the new dedicated stopped-flow facility, located on the SANS instrument D22 at ILL, to investigate the micelle-to-vesicle transformation of AOT in aqueous solution upon direct mixing with solutions of salts such as NaCl, NaBr, KCl, and KBr. It was shown that the overall process is quite slow but intensity changes can be monitored over a total period of more than 5 h. The dead time of the stopped-flow instrument used is a few milliseconds, but the main limiting factor is the time needed... 

Fig. 2.15 Suggested mechanism for the polymerization-induced woim-to-vesicle transformation during the synthesis of G47-H200 by RAFT aqueous dispersion polymerization. Reproduced from [47] with permission from American Chemical Society...

The availability of the purified transporter in large quantity has enabled investigation of its secondary structure by biophysical techniques. Comparison of the circular dichroism (CD) spectrum of the transporter in lipid vesicles with the CD spectra of water-soluble proteins of known structure indicated the presence of approximately 82% a-helix, 10% ) -turns and 8% other random coil structure [97]. No / -sheet structure was detected either in this study or in a study of the protein by the same group using polarized Fourier transform infrared (FTIR) spectroscopy [98]. In our laboratory FTIR spectroscopy of the transporter has similarly revealed that... 

Fujima, T., Frusawa, H., Minamikawa, H., Ito, K. and Shimizu, T. (2006) Elastic precursor of the transformation from glycolipid nanotube to vesicle, Journal of Physics Condensed Matter, 18, 3089—3096. Kameta, N., Minamikawa, H., Masuda, M., Mizuno, G. and Shimizu, T. (2008) Controllable biomolecule release from self-assembled organic nanotubes with asymmetric surfaces pH and temperature dependence. Soft Matter, 4 (8), 1681-1688. Weiss R.G. and Terech P. (eds.) (2006) Molecular Gels Materials with Self-Assembled Fibrillar Networks, Springer, Dordrecht. 

Fig. 67 Schematic of phase behaviour for blend of novolac epoxy resin with nearly symmetric poly(methyl acrylate-co-glycidylmelhacrylate)-0-polyisoprene. Ordered L can be swollen with up to about 30% of resin before macroscopic phase separation occurs, producing heterogeneous morphologies containing various amounts of L, C, worm-like micelles and pristine epoxy. At lower concentrations, disordered worm-like micelles transform into vesicles in dilute limit. According to [201]. Copyright 2003 Wiley...

Renelli M, Mafias V, Lo RY, Beveridge TJ (2004) DNA-containing membrane vesicles of Pseudomonas aeruginosa PAOl and their genetic transformation potential. Microbiol-Sgm 150 2161-2169... 

The development of amphipathic fluorescent dyes that label endocytic vesicles has permitted the study of endo-cytosis in nerve terminals in real time [25,26], The probe FM1-43 equilibrates between the aqueous phase and the membrane but is not membrane-permeating. The plasmalemma becomes fluorescent (Fig. 10-8). Upon endocytosis, the labeled membrane is internalized. When removed from the extracellular medium, the dye is retained by the endocytic vesicles but lost from the plasmalemma. Endocytic vesicles are transformed into synaptic vesicles containing FM1-43. Importantly, recycled synaptic vesicles lose the probe upon exocytosis. 

Vaccinia An infection, primarily local and limited to the site of inoculation, induced in man by inoculation with the vaccinia (coxpox) virus in order to confer resistance to smallpox (variola). On about the third day after vaccination, papules form at the site of inoculation which become transformed into umbilicated vesicles and later pustules they then dry up, and the scab falls off on about the twenty-first day, leaving a pitted scar in some cases there are more or less marked constitutional disturbances. 

The 31P n.m.r. of phospholipids has been the subject of a number of papers.62-89 These have been primarily aimed at investigating the conformation and motion of phospholipids in bilayers, but information has also been obtained on gel-to-liquid crystal transformations of phospholipids.65-67 A P31 1H nuclear Overhauser effect indicates that there is little tendency for mixed phosphatidylcholine/phosphatidyl-ethanolamine vesicles to segregate in separate domains.68 69 A phosphonium analogue (23) of choline chloride has been prepared and converted chemically into... 

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