Sucrose Monoester Micelles Size Determined by Fluorescence Correlation Spectroscopy (FCS)
Author
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Sánchez, Susana A.
Author
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Gratton, Enrico
es_CL
Author
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Zanocco Loyola, Antonio
Author
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Lemp Miranda, Else
Author
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Günther Sapunar, Germán
Admission date
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2014-01-09T17:59:14Z
Available date
dc.date.available
2014-01-09T17:59:14Z
Publication date
dc.date.issued
2011-12-28
Cita de ítem
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PLOS ONE Volume: 6 Issue: 12 Article Number: e29278 Published: DEC 28 2011
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Identifier
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DOI: 10.1371/journal.pone.0029278
Identifier
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https://repositorio.uchile.cl/handle/2250/121728
General note
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Artículo de publicación ISI
en_US
Abstract
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One of the several uses of sucrose detergents, as well as other micelle forming detergents, is the solubilization of different
membrane proteins. Accurate knowledge of the micelle properties, including size and shape, are needed to optimize the
surfactant conditions for protein purification and membrane characterization. We synthesized sucrose esters having
different numbers of methylene subunits on the substituent to correlate the number of methylene groups with the size of
the corresponding micelles. We used Fluorescence Correlation Spectroscopy (FCS) and two photon excitation to determine
the translational D of the micelles and calculate their corresponding hydrodynamic radius, Rh. As a fluorescent probe we
used LAURDAN (6-dodecanoyl-2-dimethylaminonaphthalene), a dye highly fluorescent when integrated in the micelle and
non-fluorescent in aqueous media. We found a linear correlation between the size of the tail and the hydrodynamic radius
of the micelle for the series of detergents measured.
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Patrocinador
dc.description.sponsorship
Fondecyt
1080412
Division of Research Resources of the National Institutes of Health
PHS 5 P41 RR-03155