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Helix–coil transition in copolypeptides. I. Poly (γ-benzyl-co-γ-methyl L-glutamate)

✍ Scribed by A. Roig; M. Cortijo


Publisher
Wiley (John Wiley & Sons)
Year
1971
Tongue
English
Weight
361 KB
Volume
10
Category
Article
ISSN
0006-3525

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✦ Synopsis


Abstract

The helix–coil transition in poly(γ‐benzyl L‐glutamate‐co‐γ‐methyl L‐glutamate) copolypeptides was studied experimentally in nonaqueous solvents and the results compared with theory. It is found that the transition can be described by the same theory as for the homopolypeptides, but the corresponding parameters are not related in the expected way to those of the homopolymers, due to the effect of the side chains on the stability of the helix, which is not taken into account explicitly by the theory.


📜 SIMILAR VOLUMES


Helix–coil transition in copolypeptides.
✍ A. Roig; F. García Blanco; M. Cortijo 📂 Article 📅 1971 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 353 KB

## Abstract The thermal helix–coil transition of poly(γ‐benzyl L‐glutamate‐__co__‐ε‐carbobenzoxy‐L‐lysine) copolypeptides was studied in solvent mixtures of different compositions. The cooperativity parameter __v__ changes linearly with polymer (and solvent) composition, whereas the heat of the tra

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In this paper two points are considered: the methods of evaluating the helical content 8 and the calculation of the parameters of the transition from experimental data and its interpretation. The parameter AH obtained is in good agreement with the calorimetric one and v is found to be independent of

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## Abstract The helix–coil conformational transition undergone by poly(γ‐benzyl‐L‐glutamate) in solutions of trifluoroacetic acid and deuterated chloroform was studied by proton and carbon‐13 nmr. The results indicate that in the case of the solvent‐induced helix–coil transition, the side chain ass