Chemically modified proteins solubilized in AOT reverse micelles. Influence of proteins charges on intermicellar interactions
✍ Scribed by G. Cassin; S. Illy; M.P. Pileni
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 735 KB
- Volume
- 221
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
In previous papers it has been shown that solubibzation of native cytochrome c in sodium bis(2-ethyIbexyl) suIfosuccinate/ water/isooctane reverse miceIIes induces a percolation phenomenon in dilute micellar solution compared to empty miceIIes. This has been attributed to an increase in the interaction potential between droplets. To confirm this hypothesis, structural studies of microemulsions filled by various cytochrome c differing by their net charge ( + 8, -3 and -12) have been performed by SAXS. The intermicellar interactions are analyzed with the adhesive hard-sphere model. It is shown that electrostatic interactions between the interfacial wall and the protein play an important role on the intermicellar interactions and on the percolation onset. This behavior has been confirmed by the change in the critical temperature for empty micelles and miceIIes filled by various cytochrome c derivatives.