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Circular dichroism studies of carbopeptoid-cyclodextrins
Alison A Edwards1, George W J Fleet, Ben A Mayes
1Biological Chemistry, Division of Biomedical Sciences, Imperial College, London, United Kingdom.
Abstract:
A series of sugar amino acids, based on open chain sugars, have been oligomerised and cyclised. The resulting cyclic carbopeptoids have been examined for desirable properties such as host-guest chemistry (as in cyclodextrins) or self-assembling properties (e.g., peptide nanotubes). Initial studies of these systems, by circular dichroism and X-ray crystallography, have given valuable insight into their stability and properties. One of the four cyclic species studied was found to interact with ion/molecular probes.
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Conformations of Cyclohexane
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal tetrahedral value,...