Results 221 to 230 of about 322,454 (266)

Sedimentation studies on membrane vesicles

Molecular Biology Reports, 1976
Analytical centrifugation was used in order to investigate the size distribution of vesicles in various membrane preparations. Under certain conditions depending among others on the speed of rotation and the temperature, a sedimentation profile was observed that was characteristic for membraneous material.
J, Boom, W S, Bont, H P, Hofs, M, De Vries   +3 more
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Lipid vesicles and membrane fusion

Advanced Drug Delivery Reviews, 1999
Membrane fusion is essential for cell survival and has attracted a great deal of both theoretical and experimental interest. Fluorescence (de)quenching measurements were designed to distinguish between bilayermerging and vesicle-mixing. Theoretical studies and various microscopic and diffraction methods have elucidated the mechanism of membrane fusion.
, Cevc, , Richardsen
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The role of membrane vesicles in tumorigenesis

Critical Reviews in Oncology/Hematology, 2011
Membrane vesicles are membrane-covered cell fragments generated by all cell types. They comprise a recently recognized new system of intercellular communication, believed to play a pivotal role in information transfer between cells, as they display a large number of biomolecules enclosed within the membrane as well as in the membrane proper.
Erna, Pap, Eva, Pállinger, András, Falus   +2 more
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Giant Vesicles with Membranous Microcompartments

Langmuir, 2011
Incubation of a cell-sized lipid membrane vesicle (giant vesicle, GV) in a diluted aqueous solution of neutral phosphate buffer salts or glucose transformed the GV to an oligovesicular vesicle (OVV) that encapsulates one or more smaller GVs. During the incubation, the membrane of flaccid vesicle invaginated and closed to form the inner vesicle of an ...
Yukihisa, Okumura, Takayuki, Nakaya, Hiroshi, Namai, Koji, Urita   +3 more
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Ultrastructure of the Membrane of Synaptic Vesicles

Nature, 1967
INVESTIGATIONS by Whittaker and Sheridan1 on permanganate fixed preparations of isolated synaptic vesicles have recently confirmed that the membrane of such organelles has the structure of a “unit membrane”2, but have also indicated that in this case the classical model should be corrected in order to take into account the results obtained on negative ...
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Domains in membranes and vesicles

Journal of Physics: Condensed Matter, 2002
Biomimetic membranes such as lipid bilayers with several molecular components exhibit intramembrane domains. These domains are formed after the membranes are quenched into a two-phase coexistence region. Solid domains tend to form facets or cylindrical segments whereas liquid domains tend to form spherical buds.
Lipowsky, R., Dimova, R.
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Anchor ring-vesicle membranes

Physical Review A, 1990
A family of the exact and analytical solutions of the equilibrium shape equation of vesicle membranes is found. They are anchor rings with generating circles of radii in the ratio 1/ \ensuremath{\surd}2 . It is shown that these ring vesicles are stable for some negative values of their spontaneous curvatures, such that experimental construction of such
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Vesicle Membrane Interactions of Penetratin Analogues

Biochemistry, 2004
Reports on serious artifacts associated with the use of cell fixation in studies of the cellular uptake of cell-penetrating peptides, also denoted protein transduction domains, have demonstrated the need for a reevaluation of the current understanding of peptide-mediated cellular delivery of large, hydrophilic molecules.
Daniel, Persson, Per E G, Thorén, Per, Lincoln, Bengt, Nordén   +3 more
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On vesicles and membrane compartments

Protoplasma, 1996
Two different mechanisms have been proposed to explain transport along the endocytic and biosynthetic transport routes in cells. The first involves stable compartments connected by vesicular traffic while the second argues that the key organelles (early endosomes or the cis Golgi) form de novo by fusion of vesicles and subsequently mature into later ...
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Localization of membrane proteins in membrane vesicles of Bacillus subtillis

Archives of Biochemistry and Biophysics, 1975
Abstract Electrons can be transferred to the respiratory chain in whole cells and in membrane vesicles of Bacillus subtilis W 23 by the membrane impermeable electron donor reduced 5-N-methyl-phenazonium-3-sulfonate as efficiently as by the membrane permeable electron donor reduced 5-N-methyl-phenazonium methyl-sulfate, indicating that the respiratory
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